Between brackets is the number of accepted extant species

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- Cyperaceae (6 081)
- Tribe Abildgaardieae Lye (569)
- Tribe Ascopholeae Nijal.
- Tribe Bisboeckelereae Pax (31)
- Tribe Bolboschoeneae (Tatanov) J.R.Starr (17)
- Tribe Calliscirpeae Lév.‐Bourret & J.R.Starr (2)
- Tribe Cariceae Dumort. (2 342)
- Genus Carex L. (2 342)
- Subgenus Carex subg. Atratae Kunth
- Subgenus Carex subg. Atratae (Kunth) Heuff.
- Subgenus Carex subg. Auritae Heuff.
- Subgenus Carex subg. Carex (1 401)
- Section Carex sect. Acrocystis Dumort. (46)
- Section Carex sect. Albae (Asch. & Graeb.) Kük. (4)
- Section Carex sect. Alliiformes Akiyama (4)
- Section Carex sect. AugustinowicziiClade (3)
- Section Carex sect. BarbaraeClade (2)
- Section Carex sect. BarrattiiClade (1)
- Section Carex sect. CastaneaClade (58)
- Section Carex sect. Ceratocystis Dumort. (18)
- Section Carex sect. Chartotechium (Börn.) V.I.Krecz. (7)
- Section Carex sect. Chlorostachyae Tuck. ex Meinsh. (11)
- Section Carex sect. Clandestinae G.Don (38)
- Section Carex sect. Collinsiae (Mack.) Mack. (1)
- Section Carex sect. ConcinnaClade (3)
- Section Carex sect. ConicaClade (50)
- Section Carex sect. Cryptostachyae Franch. (3)
- Section Carex sect. DecoraClade (118)
- Section Carex sect. Decorae (Kük.) Ohwi
- Section Carex sect. Digitatae (Fr.) Christ (4)
- Section Carex sect. DissitifloraClade (2)
- Section Carex sect. Dissitiflorae K. T. Takah. & M. N. Tamura
- Section Carex sect. DurieuiClade (1)
- Section Carex sect. EricetorumClade (2)
- Section Carex sect. EsquirolianaClade (5)
- Section Carex sect. FastigiataClade (5)
- Section Carex sect. Fecundae Kük. (18)
- Section Carex sect. FlaccaClade (31)
- Section Carex sect. Frigidae Fr. ex Kük. (2)
- Section Carex sect. FuliginosaClade (6)
- Section Carex sect. Glaucescentes Reznicek (4)
- Section Carex sect. Graciles Kük. (33)
- Section Carex sect. Grallatoriae Kük. (1)
- Section Carex sect. Griseae (L.H.Bailey) Kük. (35)
- Section Carex sect. HaematostomaClade (23)
- Section Carex sect. Hallerianae (Aschers. & Graebn.) Rouy (5)
- Section Carex sect. HirtaClade (107)
- Section Carex sect. Hymenochlaenae (Drejer) L.H.Bailey (8)
- Section Carex sect. IndicaClade (34)
- Section Carex sect. Indicae (Tuck. ex L. H. Bailey) C. B. Clarke in Hook.
- Section Carex sect. IvanoviaeClade (2)
- Section Carex sect. Limosae (Heuff.) Meinsh. (4)
- Section Carex sect. LiparocarposClade (5)
- Section Carex sect. Longirostres (Kük.) Mack. (3)
- Section Carex sect. Luzulinae Jim.Mejías, Naczi, Hipp, Roalson & Reznicek (5)
- Section Carex sect. MicrochaetaClade (9)
- Section Carex sect. MiraClade (5)
- Section Carex sect. MitrataClade (30)
- Species Carex breviculmis R.Br.
- Species Carex brevispicula G.H.Nam & G.Y.Chung
- Species Carex caryophyllea Latourr.
- Species Carex chungii Z.P.Wang
- Species Carex conspissata V.I.Krecz.
- Species Carex dapanshanica X.F.Jin, Y.J.Zhao & Zi L.Chen
- Species Carex densipilosa C.Z.Zheng & X.F.Jin
- Species Carex depressa Link
- Species Carex discoidea Boott
- Species Carex fibrillosa Franch. & Sav.
- Species Carex formosensis H.Lév. & Vaniot
- Species Carex genkaiensis Ohwi
- Species Carex kamagariensis K.Okamoto
- Species Carex leucochlora Bunge
- Variety Carex leucochlora var. aphanandra (Franch. & Sav.) T.Koyama
- Variety Carex leucochlora var. candolleana (H.Lév. & Vaniot) Katsuy. accepted as Carex candolleana H.Lév. & Vaniot
- Variety Carex leucochlora var. discoidea (Boott) T.Koyama accepted as Carex discoidea Boott
- Variety Carex leucochlora var. fibrillosa (Franch. & Sav.) T.Koyama accepted as Carex fibrillosa Franch. & Sav.
- Variety Carex leucochlora var. filiculmis (Franch. & Sav.) Kitag. accepted as Carex mitrata var. aristata Ohwi
- Variety Carex leucochlora var. gracillima (Akiyama) Katsuy.
- Variety Carex leucochlora var. horikawae (K.Okamoto) Katsuy.
- Variety Carex leucochlora var. leucochlora Bunge
- Variety Carex leucochlora var. lonchophora (Ohwi) Akiyama accepted as Carex lonchophora Ohwi
- Variety Carex leucochlora var. longearistata (Kük.) Kitag. accepted as Carex mitrata var. aristata Ohwi
- Variety Carex leucochlora var. longiaristata (Kük.) Kitag. accepted as Carex breviculmis R.Br.
- Variety Carex leucochlora var. meridiana Akiyama
- Variety Carex leucochlora var. morrisonicola (Hayata) Katsuy. accepted as Carex leucochlora var. aphanandra (Franch. & Sav.) T.Koyama
- Variety Carex leucochlora var. petrogena Kitag. accepted as Carex leucochlora var. leucochlora Bunge
- Variety Carex leucochlora var. subglabra V.N.Vassil. accepted as Carex leucochlora var. leucochlora Bunge
- Forma Carex leucochlora f. fibrillosa (Franch. & Sav.) K.T.Fu accepted as Carex fibrillosa Franch. & Sav.
- Forma Carex leucochlora f. longearistata (Kük.) Kitag. accepted as Carex mitrata var. aristata Ohwi
- Forma Carex leucochlora f. longiaristata (Kük.) Kitag. accepted as Carex breviculmis R.Br.
- Species Carex linanensis X.D.Qiu & X.F.Jin
- Species Carex markgrafii Kük.
- Species Carex microtricha Franch.
- Species Carex mitrata Franch.
- Species Carex nanpingensis X.F.Jin
- Species Carex neo-nelmesii Raymond
- Species Carex nervata Franch. & Sav.
- Species Carex polyschoenoides K.T.Fu
- Species Carex radicalispicula Tang & F.T.Wang ex Y.F.Lu & X.F.Jin
- Species Carex scopulus X.F.Jin & W.Jie Chen
- Species Carex shangchengensis S.Yun Liang
- Species Carex shanghangensis S.Yun Liang
- Species Carex subumbellata Meinsh.
- Species Carex titovii V.I.Krecz.
- Species Carex trautvetteriana Kom.
- Species Carex truncatirostris S.W.Su & S.M.Xu
- Section Carex sect. Molliculae Ohwi (18)
- Section Carex sect. Mundae Kük.
- Section Carex sect. NebrascensisClade (2)
- Section Carex sect. Occlusae C.B.Clarke (11)
- Section Carex sect. OligocaryaClade (2)
- Section Carex sect. Paludosae G.Don in J. C. Loudon (30)
- Section Carex sect. Paniceae G.Don. (54)
- Section Carex sect. Phacocystis Dumort. (116)
- Section Carex sect. Pictae Kük. (6)
- Section Carex sect. Praelongae (Kük.) Nelmes (33)
- Section Carex sect. PrasinaClade (1)
- Section Carex sect. Racemosae G.Don (70)
- Section Carex sect. Radicales (Kük.) Nelmes (15)
- Section Carex sect. Rhomboidales Kük. (54)
- Section Carex sect. Rhynchocystis Dumort. (7)
- Section Carex sect. Rostrales Meinsh. (7)
- Section Carex sect. SartwellianaClade (2)
- Section Carex sect. Scirpinae (Tuck.) Kük. (3)
- Section Carex sect. Secalinae (O. Lang) O.Lang. ex Kük. (3)
- Section Carex sect. SetigeraClade (14)
- Section Carex sect. Spirostachyae Drej. ex L.H.Bailey (102)
- Section Carex sect. Squarrosae J.Carey (3)
- Section Carex sect. Strigosae Fr. ex Christ (1)
- Section Carex sect. Stylosae (T.V.Egorova) S.Gebauer & M.H.Hoffm. (8)
- Section Carex sect. Sylvaticae Rouy (6)
- Section Carex sect. TomentosaClade (2)
- Section Carex sect. Triquetrae (L.H.Bailey) Mack. (1)
- Section Carex sect. TristachyaClade (10)
- Section Carex sect. TruncatiglumaClade (15)
- Section Carex sect. VestitaClade (2)
- Section Carex sect. VI.IS2.IncertaeSedis (24)
- Section Carex sect. VI.M.IS1.IncertaeSedis (4)
- Section Carex sect. VI.X.IS1.IncertaeSedis (19)
- Subgenus Carex subg. Caricandra C.B.Clarke
- Subgenus Carex subg. Caricimia C.B.Clarke
- Subgenus Carex subg. Cryptocarpae Tuck. ex L.H.Bailey
- Subgenus Carex subg. Dioicae Tuck.
- Subgenus Carex subg. Distantes Heuff.
- Subgenus Carex subg. Eucarex Coss. & Germ.
- Subgenus Carex subg. Euthyceras Peterm. (140)
- Subgenus Carex subg. Euvignea C.B.Clarke
- Subgenus Carex subg. Ferrugineae Heuff.
- Subgenus Carex subg. Filifoliae Tuck.
- Subgenus Carex subg. Flacceae Heuff.
- Subgenus Carex subg. Flavae Heuff.
- Subgenus Carex subg. Forficulae Franch.
- Subgenus Carex subg. Fuliginosae
- Subgenus Carex subg. Hirtae Heuff.
- Subgenus Carex subg. IncertaeSedis (14)
- Subgenus Carex subg. Indocarex Nelmes
- Subgenus Carex subg. Kreczetoviczia T.V.Egorova
- Subgenus Carex subg. Lasiocarpae Heuff.
- Subgenus Carex subg. Laxiflorae Heuff.
- Subgenus Carex subg. Leptostachyae Heuff.
- Subgenus Carex subg. Limosae Heuff.
- Subgenus Carex subg. Miliaceae Heuff.
- Subgenus Carex subg. Nardinae Tuck.
- Subgenus Carex subg. Nitidae Heuff.
- Subgenus Carex subg. Obtusatae Tuck.
- Subgenus Carex subg. Oligocarpae Heuff.
- Subgenus Carex subg. Ornithopodae Heuff.
- Subgenus Carex subg. Paludosae Heuff.
- Subgenus Carex subg. Pauciflorae Tuck.
- Subgenus Carex subg. Primocarex Kük.
- Subgenus Carex subg. Propriae (C.B.Clarke) C.B.Clarke
- Subgenus Carex subg. Pseudocyperi Heuff.
- Subgenus Carex subg. Psilostachyae Heuff.
- Subgenus Carex subg. Psyllophorae (Degl.) Peterm. (64)
- Subgenus Carex subg. Pulicares Tuck.
- Subgenus Carex subg. Scirpinae Tuck.
- Subgenus Carex subg. Scuria Raf.
- Subgenus Carex subg. Secalinae Heuff.
- Subgenus Carex subg. Siderosticta Waterway (30)
- Subgenus Carex subg. Trichocarpae Heuff.
- Subgenus Carex subg. Triodex Raf.
- Subgenus Carex subg. Triplima Raf.
- Subgenus Carex subg. Uncinia (Pers.) Baill.
- Subgenus Carex subg. Uncinia (Pers.) Peterm. (100)
- Subgenus Carex subg. Vesicariae Heuff.
- Subgenus Carex subg. Vignea (P.Beauv.) C.B.Clarke
- Subgenus Carex subg. Vignea (P.Beauv. ex T.Lestib.) Heer (337)
- Subgenus Carex subg. Vigneandra C.B.Clarke
- Subgenus Carex subg. Vignegyne C.B.Clarke
- Section Carex sect. Abditispicae G.A.Wheeler
- Section Carex sect. Aciculares (Kük.) G.A.Wheeler accepted as Carex sect. Junciformes (Boeckeler) Kük.
- Section Carex sect. Acutiformes T.V.Egorova accepted as Carex sect. Paludosae G.Don in J. C. Loudon
- Section Carex sect. Ampullaceae (Rouy) T.V.Egorova
- Section Carex sect. Anomalae J.Carey
- Section Carex sect. Aquatiles
- Section Carex sect. Australiensis C.B.Clarke
- Section Carex sect. Baccantes (T.Koyama) P.C.Li
- Section Carex sect. Bicolores C.B.Clarke
- Section Carex sect. Boernera V.I.Krecz. ex Y.L.Chang
- Section Carex sect. Canescentes Fr. accepted as Carex sect. Glareosae G.Don
- Section Carex sect. Capitellatae (Meinsh.) Ohwi
- Section Carex sect. Cardioperae V.I.Krecz. ex T.V.Egorova
- Section Carex sect. Carex
- Section Carex sect. Caryotheca V.I.Krecz. ex T.V.Egorova
- Section Carex sect. Chordorrhizae
- Section Carex sect. Cryptostachyae (Ohwi) Nelmes
- Section Carex sect. Cyclostylatae S.W.Su
- Section Carex sect. Cyperoideae Pax
- Section Carex sect. Digitatae Fr.
- Section Carex sect. Distinax Raf.
- Section Carex sect. Divisae
- Section Carex sect. Echinochlaenae Kük. accepted as Carex sect. Spirostachyae Drej. ex L.H.Bailey
- Section Carex sect. Echinochlomorphae Y.L.Chang ex S.Yun Liang
- Section Carex sect. Eglandulosae (T.V.Egorova) Schekhovts.
- Section Carex sect. Elatae Kük. accepted as Carex sect. Spirostachyae Drej. ex L.H.Bailey
- Section Carex sect. Elyna (Schrad.) Katsuy. & T.Hoshino
- Section Carex sect. Elyna (Schrad.) S.R.Zhang
- Section Carex sect. Extensae Fr.
- Section Carex sect. Filicinae (C.B.Clarke) Nelmes
- Section Carex sect. Forficulae (Kük.) Raymond
- Section Carex sect. Frigidae Fr.
- Section Carex sect. Glaciales
- Section Carex sect. Glaucescentes Reznicek
- Section Carex sect. Globulares
- Section Carex sect. Hangzhouenses C.Z.Zheng, X.F.Jin & B.Y.Ding
- Section Carex sect. Heleonastes (Kunth) A.E.Kozhevn.
- Section Carex sect. Heleonastes Kunth
- Section Carex sect. Hemiscaposae C.B.Clarke
- Section Carex sect. Hirtifoliae Reznicek
- Section Carex sect. Hispidae Mack. ex Reznicek
- Section Carex sect. Hostianae (T.V.Egorova) Danylyk & Jac.Koopman
- Section Carex sect. Kobresia (Willd.) S.R.Zhang
- Section Carex sect. Kobresia (Willd.) Melnikov
- Section Carex sect. Lageniformes (Ohwi) Nelmes
- Section Carex sect. Laxae (C.B.Clarke) S.R.Zhang
- Section Carex sect. Laxiflorae Kunth
- Section Carex sect. Legitimae W.D.J.Koch
- Section Carex sect. Lentex Raf.
- Section Carex sect. Longicaules Mack. ex Reznicek
- Section Carex sect. Mitratae Kük.
- Section Carex sect. Monostachyae Meinsh.
- Section Carex sect. Multiflorae Kük.
- Section Carex sect. Onatex Raf.
- Section Carex sect. Orthocerates Koch
- Section Carex sect. Paludosae Fr. ex Kük.
- Section Carex sect. Paniculatae G.Don
- Section Carex sect. Parvulae L.E.Mora & O.Rangel
- Section Carex sect. Pellucidae G.A.Wheeler
- Section Carex sect. Polystacheae C.B.Clarke
- Section Carex sect. Propriae C.B.Clarke
- Section Carex sect. Psammostachys (N.A.Ivanova) S.R.Zhang
- Section Carex sect. Pseudo-cypereae Tuck.
- Section Carex sect. Pseudo-cypereae Kük.
- Section Carex sect. Pseudokobresia (C.B.Clarke) S.R.Zhang
- Section Carex sect. Psyllophora F.Muell.
- Section Carex sect. Rarae C.B.Clarke
- Section Carex sect. Scirpinae (Tuck.) Kük.
- Section Carex sect. Setigerae Kukkonen
- Section Carex sect. Simplices (C.B.Clarke) Melnikov
- Section Carex sect. Stenorhynchae Kük.
- Section Carex sect. Stramentitiae (C.B.Clarke) Nelmes
- Section Carex sect. Thomsonianae Y.L.Chang ex S.Yun Liang
- Section Carex sect. Trachychlaenae Drejer
- Section Carex sect. Tristimex Raf.
- Section Carex sect. Tumidae Kük.
- Section Carex sect. Tuminensis Y.L.Chang & Y.L.Yang
- Section Carex sect. Unciniaeformes Kük.
- Section Carex sect. Vignea P.Beauv.
- Section Carex sect. Vigneastra Tuck.
- Section Carex sect. VII.Incertae Sedis
- Subsection Carex subsect. Aciculares Kük.
- Subsection Carex subsect. Aciculares
- Subsection Carex subsect. Alajicae T.V.Egorova
- Subsection Carex subsect. Alpinae Kalela ex T.V.Egorova
- Subsection Carex subsect. Ampullaceae
- Subsection Carex subsect. Aquaticae T.V.Egorova
- Subsection Carex subsect. Aquatiles (Meinsh.) T.V.Egorova
- Subsection Carex subsect. Archaicae T.V.Egorova
- Subsection Carex subsect. Aterrimae T.V.Egorova
- Subsection Carex subsect. Atropictae G.A.Wheeler
- Subsection Carex subsect. Australes Kük.
- Subsection Carex subsect. Baccantes T.Koyama
- Subsection Carex subsect. Blepharicarpae T.V.Egorova
- Subsection Carex subsect. Bostrychostigmaticae T.V.Egorova
- Subsection Carex subsect. Capricornes T.V.Egorova
- Subsection Carex subsect. Caryophylleae T.V.Egorova
- Subsection Carex subsect. Chalcandrae (V.I.Krecz. ex Egor.) T.V.Egorova
- Subsection Carex subsect. Chlorostrachyae Tuck.
- Subsection Carex subsect. Chordorrhizae (Meinsh.) T.V.Egorova
- Subsection Carex subsect. Cilicicae T.V.Egorova
- Subsection Carex subsect. Crispifoliatae T.V.Egorova
- Subsection Carex subsect. Cryptocarpae Kük.
- Subsection Carex subsect. Cryptocarpae (Tuck. ex L.H.Bailey) Kük.
- Subsection Carex subsect. Cryptostachyae Ohwi
- Subsection Carex subsect. Curaicae (T.V.Egorova) T.V.Egorova
- Subsection Carex subsect. Decorae Kük.
- Subsection Carex subsect. Depressae T.V.Egorova
- Subsection Carex subsect. Digitatae (Fries) T.V.Egorova
- Subsection Carex subsect. Dioicae (Egor.) T.V.Egorova
- Subsection Carex subsect. Distichae (T.V.Egorova) T.V.Egorova
- Subsection Carex subsect. Divisae (Christ ex Kük.) T.V.Egorova
- Subsection Carex subsect. Eglandulosae T.V.Egorova
- Subsection Carex subsect. Elatae T.V.Egorova
- Subsection Carex subsect. Elatae (Kük.) Luceño & M.Escudero
- Subsection Carex subsect. Elatiformes T.V.Egorova
- Subsection Carex subsect. Elongatibracteatae T.V.Egorova
- Subsection Carex subsect. Enerves (Egor.) T.V.Egorova
- Subsection Carex subsect. Erostratae T.V.Egorova
- Subsection Carex subsect. Eu-mitratae Kük.
- Subsection Carex subsect. Fimbriatae T.V.Egorova
- Subsection Carex subsect. Forficulae Kük.
- Subsection Carex subsect. Fultae J.Oda & M.N.Tamura
- Subsection Carex subsect. Glabrae T.V.Egorova
- Subsection Carex subsect. Glaciales (Hyl.) T.V.Egorova
- Subsection Carex subsect. Glaciales T.V.Egorova
- Subsection Carex subsect. Glandulosae T.V.Egorova
- Subsection Carex subsect. Globulares (Meinsh.) T.V.Egorova
- Subsection Carex subsect. Graciles Kük.
- Subsection Carex subsect. Gynaecandrae T.V.Egorova
- Subsection Carex subsect. Holostomae T.V.Egorova
- Subsection Carex subsect. Hostianae T.V.Egorova
- Subsection Carex subsect. Humiles T.V.Egorova
- Subsection Carex subsect. Intumescentes Menapace, Wujek & Reznicek
- Subsection Carex subsect. Jacentes T.V.Egorova
- Subsection Carex subsect. Lageniformes Ohwi
- Subsection Carex subsect. Lanatae T.V.Egorova
- Subsection Carex subsect. Leucochlorae T.V.Egorova
- Subsection Carex subsect. Longiaristatae T.V.Egorova
- Subsection Carex subsect. Longibracteatae T.V.Egorova
- Subsection Carex subsect. Macrogynae T.V.Egorova
- Subsection Carex subsect. Mandshuricae T.V.Egorova
- Subsection Carex subsect. Melanostachyae Tuck.
- Subsection Carex subsect. Monandrae V.I.Krecz. ex T.V.Egorova
- Subsection Carex subsect. Multiflorae Kük.
- Subsection Carex subsect. Nesophilae T.V.Egorova
- Subsection Carex subsect. Nitidae (Heuff.) T.V.Egorova
- Subsection Carex subsect. Orbiculares T.V.Egorova
- Subsection Carex subsect. Pamiricae T.V.Egorova
- Subsection Carex subsect. Papilliferae T.V.Egorova
- Subsection Carex subsect. Pediformes T.V.Egorova
- Subsection Carex subsect. Piluliferae T.V.Egorova
- Subsection Carex subsect. Planiculmes T.V.Egorova
- Subsection Carex subsect. Podocarpae T.V.Egorova
- Subsection Carex subsect. Pseudocuraicae (T.V.Egorova) T.V.Egorova
- Subsection Carex subsect. Pseudocypereae T.V.Egorova
- Subsection Carex subsect. Pseudofoetidae (Egor.) T.V.Egorova
- Subsection Carex subsect. Rarae T.V.Egorova
- Subsection Carex subsect. Redowskianae (Egor.) T.V.Egorova
- Subsection Carex subsect. Reticulatae T.V.Egorova
- Subsection Carex subsect. Sabulosae T.V.Egorova
- Subsection Carex subsect. Sachalinenses T.V.Egorova
- Subsection Carex subsect. Serotinae T.V.Egorova
- Subsection Carex subsect. Silvaticae T.V.Egorova
- Subsection Carex subsect. Stenocarpae T.V.Egorova
- Subsection Carex subsect. Strigosae (Andersson) T.V.Egorova
- Subsection Carex subsect. Stylosae T.V.Egorova
- Subsection Carex subsect. Subradicales T.V.Egorova
- Subsection Carex subsect. Supinae (Meinsh.) T.V.Egorova
- Subsection Carex subsect. Tomentosae T.V.Egorova
- Subsection Carex subsect. Umbrosae T.V.Egorova
- Subsection Carex subsect. Urostachyae T.V.Egorova
- Subsection Carex subsect. Verae Tuck.
- Subsection Carex subsect. Vulgares Asch.
- Subsection Carex subsect. Williamsianae T.V.Egorova
- Series Carex ser. Atratae (Kunth) A.E.Kozhevn.
- Series Carex ser. Chalcandrae
- Series Carex ser. Curaicae
- Series Carex ser. Decorae (Kük.) A.E.Kozhevn.
- Series Carex ser. Digitatae (Fr.) A.E.Kozhevn.
- Series Carex ser. Dioicae
- Series Carex ser. Distichae
- Series Carex ser. Enerves
- Series Carex ser. Extensae (Fr.) A.E.Kozhevn.
- Series Carex ser. ferruginea Lepage
- Series Carex ser. Laxiflorae (Kunth) A.E.Kozhevn.
- Series Carex ser. Mitratae (Kük.) A.E.Kozhevn.
- Series Carex ser. Oceanicae C.B.Clarke
- Series Carex ser. Orthocerates (Koch) A.E.Kozhevn.
- Series Carex ser. Paludosae (Fr. ex Kük.) A.E.Kozhevn.
- Series Carex ser. Pseudocuraicae
- Series Carex ser. Pseudofoetidae
- Series Carex ser. Redowskianae
- Series Carex ser. Trichosaccae (C.B.Clarke) C.B.Clarke
- Series Carex ser. Vignea (P.Beauv.) A.E.Kozhevn.
- Species Carex ×arctophila F.Nyl.
- Species Carex ×botasgdensis Kük.
- Species Carex ×catalaunica Sennen
- Species Carex ×csomadensis Simonk.
- Species Carex ×cuatrecasasii Sennen
- Species Carex ×enontekiensis Montell
- Species Carex ×enshuensis T.Koyama
- Species Carex ×goroi T.Koyama
- Species Carex ×goyozanensis M.Kikuchi & Mochizuki
- Species Carex ×haussknechtii Podp.
- Species Carex ×hokariensis T.Koyama
- Species Carex ×inaensis T.Koyama
- Species Carex ×innocua Wallr.
- Species Carex ×insolita T.Koyama
- Species Carex ×interjecta Waisb.
- Species Carex ×knieskernii Dewey
- Species Carex ×kurilensis Ohwi
- Species Carex ×labbei H.Lév.
- Species Carex ×legrandiana H.Lév. & Lamb.
- Species Carex ×lidii Hadac
- Species Carex ×lidii Flatberg
- Species Carex ×mastnyana Otruba & Podp.
- Species Carex ×mercieri H.Lév.
- Species Carex ×mihashii T.Koyama
- Species Carex ×naegelii Brügger ex Sennholz
- Species Carex ×olneyi Boott
- Species Carex ×petrae-fu F.Murr
- Species Carex ×pseudohelvola Kihlm.
- Species Carex ×rubrovaginata (Hamlin) K.A.Ford
- Species Carex ×stygia Fr.
- Species Carex ×subdecolorans Nyár.
- Species Carex ×sullivantii Boott
- Species Carex ×toshironis T.Koyama
- Species Carex ×viadrina Schube
- Species Carex ×xenostachya T.Koyama
- Species Carex aa Kom. accepted as Carex heleonastes subsp. heleonastes Ehrh. ex L.f.
- Species Carex abacta L.H.Bailey accepted as Carex michauxiana Boeckeler
- Species Carex abbreviata Prescott ex Boott accepted as Carex torreyi Tuck.
- Species Carex abdita E.P.Bicknell accepted as Carex umbellata Willd.
- Species Carex abitibiana Lepage
- Species Carex abjiciens Steud. accepted as Carex magellanica subsp. magellanica Lam.
- Species Carex ablata L.H.Bailey accepted as Carex luzulina var. ablata (L.H.Bailey) F.J.Herm.
- Species Carex ablita Steud.
- Species Carex abnormis (Rouy) Prain accepted as Carex mucronata All.
- Species Carex abnormis Rouy accepted as Carex mucronata All.
- Species Carex abortiva Holmb.
- Species Carex abramsii Mack. accepted as Carex lemmonii W.Boott
- Species Carex absconditiformis Fernald accepted as Carex laxiculmis var. laxiculmis Schwein.
- Species Carex abyssinica Chiov. accepted as Carex phragmitoides Kük.
- Species Carex accedens Holm accepted as Carex aperta Boott
- Species Carex acrifolia V.I.Krecz. accepted as Carex pseudofoetida subsp. acrifolia (V.I.Krecz.) Kukkonen
- Species Carex acroandra Schur accepted as Carex repens Bellardi
- Species Carex acrogyna H.Lév. & Vaniot accepted as Carex ischnostachya var. fastigiata T.Koyama
- Species Carex acrolepis Ledeb. accepted as Carex gmelinii Hook. & Arn.
- Species Carex acrolepis Liebm. accepted as Carex polystachya var. polystachya Sw. ex Wahlenb.
- Species Carex acrophila S.T.Blake accepted as Carex bilateralis Hayata
- Species Carex acuminata Rchb. accepted as Carex evoluta Hartm.
- Species Carex acuminata Willd. accepted as Carex flacca subsp. erythrostachys (Hoppe) Holub
- Species Carex acuta Huds. accepted as Carex riparia Curtis
- Species Carex acuta L.H.Bailey accepted as Carex riparia Curtis
- Species Carex acutangula (F.Nyl.) Väre accepted as Carex halophila var. halophila F.Nyl.
- Species Carex acutatiformis H.E.Hess accepted as Carex cognata Kunth
- Species Carex acutiformis Brot. accepted as Carex hispida Willd. ex Schkuhr
- Species Carex acutina L.H.Bailey accepted as Carex nudata W.Boott
- Species Carex acutinella Mack. accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex acutissima Degl. accepted as Carex pyrenaica subsp. pyrenaica Wahlenb.
- Species Carex adulterina Chenevard
- Species Carex adumana Makino accepted as Carex lasiolepis Franch.
- Species Carex adusta J.Carey ex Boott accepted as Carex silicea Olney
- Species Carex aederi Desv. accepted as Carex pilulifera subsp. pilulifera L.
- Species Carex aemulans Liebm. & Drejer accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex aenea Fernald accepted as Carex foenea Willd.
- Species Carex aequa C.B.Clarke accepted as Carex serratodens S.Watson
- Species Carex aequabilis Boott accepted as Carex dianae var. aequabilis (Boott) Kük.
- Species Carex aequalis Notø
- Species Carex aequata Nees ex Boott accepted as Carex myosurus Nees
- Species Carex aequibilirostris Sutô & Suzuki accepted as Carex hymenodon Ohwi
- Species Carex aequivoca V.I.Krecz. accepted as Carex aterrima subsp. medwedewii (Leskov) T.V.Egorova
- Species Carex aestivaliformis Mack.
- Species Carex aethostachya Schkuhr accepted as Carex atrata subsp. atrata L.
- Species Carex affinis (F.Nyl.) Nyman accepted as Carex halophila var. halophila F.Nyl.
- Species Carex affinis R.Br. accepted as Carex obtusata Lilj.
- Species Carex agglomerata Mack. accepted as Carex aggregata Mack.
- Species Carex aitchisonii Boeckeler accepted as Carex diluta M.Bieb.
- Species Carex ajanensis Vorosch. accepted as Carex alba Scop.
- Species Carex akanensis Franch. accepted as Carex sordida Van Heurck & Müll.Arg.
- Species Carex akiensis K.Okamoto accepted as Carex leucochlora var. leucochlora Bunge
- Species Carex akitaensis Fujiw.
- Species Carex akiyamana Ohwi
- Species Carex aladagensis Kük. ex J.Schultze-Motel accepted as Carex tristis M.Bieb.
- Species Carex alba Dewey accepted as Carex eburnea Boott
- Species Carex alba Bastard accepted as Carex pilulifera subsp. pilulifera L.
- Species Carex albata Boott ex Franch. & Sav. accepted as Carex argyrolepis Maxim. ex Franch. & Sav.
- Species Carex alberti H.Lév.
- Species Carex albescens F.Nyl. accepted as Carex ×arctophila F.Nyl.
- Species Carex albida L.H.Bailey accepted as Carex lemmonii W.Boott
- Species Carex albidula Holmb. accepted as Carex mithala Callmé
- Species Carex albirostris C.B.Clarke accepted as Carex davisii Schwein. & Torr.
- Species Carex alboatra Willd. ex Kunth accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex albomarginata Mack. ex Parish accepted as Carex preslii Steud.
- Species Carex albomas C.B.Clarke accepted as Carex sachalinensis var. sachalinensis F.Schmidt
- Species Carex albowii Leskov accepted as Carex mingrelica Kük.
- Species Carex aleutica Akiyama accepted as Carex kelloggii var. limnophila (Holm) B.L.Wilson & R.E.Brainerd
- Species Carex alexeenkoana Litv. accepted as Carex haematostoma Nees
- Species Carex algarbiensis Samp. accepted as Carex divisa Huds.
- Species Carex algeriensis Nelmes accepted as Carex paui Sennen
- Species Carex allegheniensis Mack. accepted as Carex debilis var. rudgei L.H.Bailey
- Species Carex allensteiniensis H.Gross accepted as Carex heterophyta Holmb.
- Species Carex allolepis Rchb.
- Species Carex allomacros Steud. accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex allorgei Sennen accepted as Carex halleriana Asso
- Species Carex alluvialis Figert
- Species Carex almii Holmb.
- Species Carex alopecurus Lapeyr. accepted as Eriophorum latifolium Hoppe
- Species Carex alpestris Dewey accepted as Carex albicans var. albicans Willd. ex Spreng.
- Species Carex alpestris Lam. accepted as Carex cespitosa L.
- Species Carex alpestris All. accepted as Carex halleriana Asso
- Species Carex alpestris Gaudin accepted as Carex sempervirens Vill.
- Species Carex alpicola (Wahlenb.) H.Lindb. accepted as Carex brunnescens subsp. brunnescens (Pers.) Poir.
- Species Carex alpigena A.Kern. ex Dalla Torre accepted as Carex ferruginea Scop.
- Species Carex alpina Honck. accepted as Carex nigra subsp. alpina (Gaudin) Lemke
- Species Carex alpina Sw. ex Wahlenb. accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex alpina Schrank accepted as Carex sempervirens Vill.
- Species Carex alsatica Zahn
- Species Carex alsia Raymond accepted as Carex decaulescens subsp. alsia (Raymond) Kukkonen
- Species Carex altaica Gorodkov accepted as Carex orbicularis Boott
- Species Carex alterna (L.H.Bailey) C.B.Clarke accepted as Carex praegracilis W.Boott
- Species Carex alticola Popl. ex Sukaczev accepted as Carex argunensis Turcz. ex Trevir.
- Species Carex altocaulis (Dewey) Britton accepted as Carex vaginata var. vaginata Tausch
- Species Carex alveata Boott accepted as Carex tetanica Schkuhr
- Species Carex amami-oshimensis Akiyama accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex ambigua Moench accepted as Carex acuta L.
- Species Carex ambigua Link accepted as Carex oedipostyla Duval-Jouve
- Species Carex ambleocarpa Willd. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex amblyolepis Trautv. & C.A.Mey. accepted as Carex vanheurckii subsp. vanheurckii Müll.Arg.
- Species Carex amblyorhyncha V.I.Krecz. accepted as Carex marina subsp. marina Dewey
- Species Carex ambusta Boott accepted as Carex saxatilis L.
- Species Carex ammophila Willd. accepted as Carex divisa Huds.
- Species Carex amoena Boott accepted as Carex raphidocarpa Nees
- Species Carex amphigena (Fernald) Mack. accepted as Carex glareosa subsp. glareosa Schkuhr ex Wahlenb.
- Species Carex amphilogos K.Koch accepted as Carex maritima Gunnerus
- Species Carex amphora Franch. & Sav. accepted as Carex pisiformis Boott
- Species Carex amplisquama F.J.Herm. accepted as Carex communis var. amplisquama (F.J.Herm.) Rettig
- Species Carex ampullacea Wulfen ex Wahlenb. accepted as Carex michelii Host
- Species Carex ampullacea Gooden. accepted as Carex rostrata Stokes
- Species Carex amurensis Kük. accepted as Carex sordida Van Heurck & Müll.Arg.
- Species Carex anceps Willd. ex Kunth accepted as Carex grioletii Roem. ex Schkuhr
- Species Carex anceps Muhl. ex Willd. accepted as Carex laxiflora var. laxiflora Lam.
- Species Carex andalusica (H.Lindb.) A.W.Hill accepted as Carex laevigata Sm.
- Species Carex andalusica H.Lindb. accepted as Carex laevigata Sm.
- Species Carex andicola G.A.Wheeler accepted as Carex firmicaulis Kalela
- Species Carex andoiniana De Not. ex Steud. accepted as Carex olbiensis Jord.
- Species Carex andoiniana De Not. accepted as Carex olbiensis Jord.
- Species Carex androgyna L.H.Bailey accepted as Carex anisostachys Liebm.
- Species Carex androgyna Balb. accepted as Carex bicolor Bellardi ex All.
- Species Carex aneurocarpa V.I.Krecz. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex angarae Steud. accepted as Carex media R.Br.
- Species Carex anguillata Drejer accepted as Carex dacica Heuff.
- Species Carex angusta (C.B.Clarke) Sameer Patil accepted as Carex angusta (C.B.Clarke) Kottaim. & R.Ganesan
- Species Carex angustifolia Sm. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex angustifructus (Kük.) Nelmes accepted as Carex atrofusca subsp. minor (Boott) T.Koyama
- Species Carex angustior Mack. accepted as Carex echinata subsp. echinata Murray
- Species Carex anhuiensis S.W.Su & S.M.Xu accepted as Carex truncatirostris S.W.Su & S.M.Xu
- Species Carex aniaiensis Fujiw. & Y.Matsuda
- Species Carex anningensis F.T.Wang & Tang ex P.C.Li accepted as Carex caudispicata var. caudispicata F.T.Wang & Tang ex P.C.Li
- Species Carex annulata Kük. accepted as Carex oligocarya C.B.Clarke
- Species Carex anomala Janka accepted as Carex caryophyllea Latourr.
- Species Carex anomala Boott accepted as Carex gibba Wahlenb.
- Species Carex anomala Steud. accepted as Carex petitiana subsp. petitiana A.Rich.
- Species Carex anomocarya Nelmes accepted as Carex harlandii subsp. harlandii Boott
- Species Carex anselmi Sennen
- Species Carex antarctogena Roiv. accepted as Carex arctogena Harry Sm.
- Species Carex anthericoides J.Presl & C.Presl accepted as Carex macrocephala Willd. ex Spreng.
- Species Carex anticostensis (Fernald) Lepage accepted as Carex mainensis Porter in Britton
- Species Carex antucensis Kunze ex Kunth accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex anwandteri Phil. accepted as Carex acutata Boott
- Species Carex aomorensis Franch. accepted as Carex capillacea var. sachalinensis (F.Schmidt) Ohwi
- Species Carex aphanandra Franch. & Sav. accepted as Carex leucochlora var. aphanandra (Franch. & Sav.) T.Koyama
- Species Carex apiahyensis Palla accepted as Carex sororia Kunth
- Species Carex apoda Clokey accepted as Carex atrosquama Mack.
- Species Carex apodostachya Ohwi accepted as Carex atrata subsp. atrata L.
- Species Carex aporandra Kunze ex Boott accepted as Carex shortiana Dewey & Torr.
- Species Carex appeliana Zahn accepted as Carex pauliana F.W.Schultz
- Species Carex approximata All. accepted as Carex ericetorum Pollich
- Species Carex aprica Turcz. ex Besser accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex aquanigra B.Boivin accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex aquatilis Ten. accepted as Carex microcarpa Bertol. ex Moris
- Species Carex aquilonalis Akiyama accepted as Carex jacens C.B.Clarke
- Species Carex arakamensis C.B.Clarke accepted as Carex microchaeta subsp. nesophila (Holm) D.F.Murray
- Species Carex arakanei T.Koyama
- Species Carex araucana Phil. accepted as Carex fuscula d'Urv.
- Species Carex archata Boot.
- Species Carex arctica Dewey accepted as Carex parryana Dewey
- Species Carex arctica Deinboll ex Fr. accepted as Carex stenophylla subsp. stenophylla Wahlenb.
- Species Carex arctica Deinb. accepted as Carex stenophylla Wahlenb.
- Species Carex arctisibirica (Jurtzev) Czerep. accepted as Carex bigelowii subsp. arctisibirica (Jurtzev) Ã.Löve & D.Löve
- Species Carex arctophila F.Nyl.
- Species Carex arcuata C.Laest. accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex arcuata Wahlenb. accepted as Carex extensa Gooden.
- Species Carex arcuata Franch. accepted as Carex mollicula Boott
- Species Carex ardoinoana De Not. accepted as Carex olbiensis Jord.
- Species Carex arenaria Leers
- Species Carex arenaria Dubois ex Steud. accepted as Carex praecox Schreb.
- Species Carex argentea J.F.Gmel. accepted as Carex alba Scop.
- Species Carex argentea Vill. accepted as Carex alba Scop.
- Species Carex argyrocarpa Poepp. accepted as Carex banksii Boott
- Species Carex argyroglochin Hornem. accepted as Carex leporina L.
- Species Carex argyrostachys H.Lév. & Vaniot accepted as Carex gifuensis Franch.
- Species Carex arida Schwein. & Torr. accepted as Carex muskingumensis Schwein.
- Species Carex arida Schleich. ex Kunth accepted as Carex sempervirens Vill.
- Species Carex aristata R.Br. accepted as Carex atherodes Spreng.
- Species Carex aristata Siegert ex Wimm. accepted as Carex atherodes Spreng.
- Species Carex aristata Dewey accepted as Carex davisii Schwein. & Torr.
- Species Carex aristata Honck. accepted as Carex praecox Schreb.
- Species Carex aristata D.Don accepted as Carex setigera var. setigera D.Don
- Species Carex arizonensis C.B.Clarke accepted as Carex alma L.H.Bailey
- Species Carex arizonensis Kük. accepted as Carex thurberi Dewey ex Torr.
- Species Carex armena Boiss. accepted as Carex hostiana DC.
- Species Carex arnottiana Boott accepted as Carex lobulirostris Drejer
- Species Carex arrhyncha Franch. accepted as Carex tenuiflora Wahlenb.
- Species Carex arridens C.B.Clarke accepted as Carex perakensis var. perakensis C.B.Clarke
- Species Carex arthuriana C.L.Beckm. & Figert
- Species Carex artinux C.B.Clarke accepted as Carex alterniflora var. fulva Ohwi
- Species Carex artirostrata C.B.Clarke accepted as Carex banksii Boott
- Species Carex artitecta Mack. accepted as Carex albicans var. albicans Willd. ex Spreng.
- Species Carex asa-grayi L.H.Bailey accepted as Carex grayi J.Carey
- Species Carex ascocentra C.B.Clarke ex Franch. accepted as Carex ascotreta C.B.Clarke ex Franch.
- Species Carex aspera Willd. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex asperifolia Steud. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex asperinervis T.Koyama accepted as Carex bilateralis Hayata
- Species Carex asperula Turcz. accepted as Carex meyeriana Kunth
- Species Carex asperula Nees accepted as Carex psychrophila Nees
- Species Carex aspratilis V.I.Krecz. accepted as Carex diluta M.Bieb.
- Species Carex assimilis Steud. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex astonii Hamlin accepted as Carex druceana var. astonii (Hamlin) Edgar
- Species Carex astracanica Willd. ex Kunth accepted as Carex muricata subsp. muricata L.
- Species Carex athabascensis F.J.Herm. accepted as Carex scirpoidea var. scirpoidea Michx.
- Species Carex atjehensis Kük. accepted as Carex finitima Boott
- Species Carex atrata Banks ex Boott accepted as Carex banksii var. banksii Boott
- Species Carex atrofurfur T.Koyama accepted as Carex infuscata Nees
- Species Carex atrofusca Steven accepted as Carex atrata subsp. atrata L.
- Species Carex atrofusca Willd. ex Steud. accepted as Carex pichinchensis Kunth
- Species Carex atronucula Hayata accepted as Carex sociata Boott
- Species Carex atropurpurea Fisch. ex Trevir. accepted as Carex atrata subsp. atrata L.
- Species Carex atropurpurea Boeckeler accepted as Carex perprava C.B.Clarke
- Species Carex atrorufa Willd. ex Kunth accepted as Carex pichinchensis Kunth
- Species Carex atrosanguinea Nelmes accepted as Carex turrita var. turrita C.B.Clarke
- Species Carex atrovirens Boeckeler accepted as Carex aureolensis Steud.
- Species Carex atroviridis Ohwi accepted as Carex multifolia var. multifolia Ohwi
- Species Carex attenuata R.Br. accepted as Carex rupestris subsp. rupestris All.
- Species Carex aueri Kalela accepted as Carex reichei Kük.
- Species Carex augustini Tuyama accepted as Carex toyoshimae Tuyama
- Species Carex auriculata L.H.Bailey accepted as Carex angustata Boott
- Species Carex auroniensis L.C.Lamb.
- Species Carex australis Kirk accepted as Carex litorosa L.H.Bailey
- Species Carex austriaca Schkuhr accepted as Carex divisa Huds.
- Species Carex austroafghanica Raymond accepted as Carex divisa Huds.
- Species Carex austroafricana (Kük.) Raymond accepted as Carex rhodesiaca Nelmes
- Species Carex austroflaccida K.L.Wilson accepted as Carex flaccida (S.T.Blake) K.L.Wilson
- Species Carex austrokoreensis Ohwi accepted as Carex ligulata Nees
- Species Carex austromontana Parish accepted as Carex jamesii Schwein.
- Species Carex austrosibirica Melnikov accepted as Carex macroprophylla (Y.C.Yang) S.R.Zhang
- Species Carex austroussuriensis A.E.Kozhevn. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex autumnalis Mack. accepted as Carex marianensis Stacey
- Species Carex axillaris Link accepted as Carex diluta M.Bieb.
- Species Carex axillaris Gooden. accepted as Carex pseudoaxillaris K.Richt.
- Species Carex axillaris L. accepted as Carex remota subsp. remota L.
- Species Carex ayouensis X.Y.Mao & Y.C.Yang accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex azorica J.Gay accepted as Carex pilulifera subsp. azorica (J.Gay) Franco & Rocha Afonso
- Species Carex azuayae Steyerm. accepted as Carex enneastachya C.B.Clarke
- Species Carex baazasana Steud. accepted as Carex cherokeensis Schwein.
- Species Carex backiana Dewey accepted as Carex obtusata Lilj.
- Species Carex badia Pers. accepted as Carex canescens subsp. canescens L.
- Species Carex baetica Auersw. ex Willk. accepted as Carex distans subsp. distans L.
- Species Carex bakanensis H.Lév. & Vaniot accepted as Carex ligulata Nees
- Species Carex bakkeriana D.T.E.Ploeg & Rudolphy
- Species Carex baksztensis Gorski ex Schmalh.
- Species Carex balbii Schkuhr ex Balb.
- Species Carex balbisii Schkuhr ex Balb. accepted as Carex extensa Gooden.
- Species Carex balbisii Schkuhr ex Spreng. accepted as Carex extensa var. balbisii (Schkuhr ex Spreng.) Nyman
- Species Carex baldensis Vill. accepted as Carex foetida All.
- Species Carex baldwinia Dewey accepted as Carex elliottii Schwein. & Torr.
- Species Carex baldwiniana Steud. accepted as Carex elliottii Schwein. & Torr.
- Species Carex bambusetorum Merr. accepted as Carex breviscapa C.B.Clarke
- Species Carex banata Sm. accepted as Carex maritima Gunnerus
- Species Carex banatica Heuff. accepted as Carex buekii Wimm.
- Species Carex baranovii Y.L.Chou & Liou accepted as Carex atrata subsp. atrata L.
- Species Carex barbarae Parish accepted as Carex schottii Dewey
- Species Carex baritiana Porcius accepted as Carex depressa subsp. transsilvanica (Schur) K.Richt.
- Species Carex barrei H.Lév. accepted as Carex alberti H.Lév.
- Species Carex barrosii Nelmes accepted as Carex sagei Phil.
- Species Carex bartlettii O'Neill accepted as Carex polystachya var. bartlettii (O'Neill) Standl. & Steyerm.
- Species Carex basilaris Jord. accepted as Carex depressa subsp. basilaris (Jord.) Cif. & Giacom.
- Species Carex basilata Ohwi accepted as Carex echinata subsp. echinata Murray
- Species Carex bastardiana DC. accepted as Carex pilulifera subsp. pilulifera L.
- Species Carex bauhwaensis Z.P.Wang accepted as Carex polyschoena H.Lév. & Vaniot
- Species Carex baviensis Franch. accepted as Carex japonica Thunb.
- Species Carex bayardii Fernald accepted as Carex crus-corvi Shuttlew. ex Kunze
- Species Carex beckeri C.A.Mey. ex Claus accepted as Carex michelii Host
- Species Carex beckmanniana Figert
- Species Carex beckmannii Keck
- Species Carex beecheyana Boott ex E.Desv. accepted as Carex hookeri Kunth
- Species Carex beechyana Boott accepted as Carex hookeri Kunth
- Species Carex behringensis Gand. accepted as Carex lyngbyei Hornem.
- Species Carex behringensis C.B.Clarke accepted as Carex podocarpa R.Br.
- Species Carex belezii H.Lév. & Vaniot accepted as Carex fussii Simonk.
- Species Carex bellardii All. accepted as Carex myosuroides Vill.
- Species Carex bella-villa Dewey accepted as Carex lupulina Muhl. ex Willd.
- Species Carex bengalensis Roxb. accepted as Carex cruciata Wahlenb.
- Species Carex bengalensis Thwaites accepted as Carex indica var. indica L.
- Species Carex bengalensis Bock. accepted as Carex pyramidalis Kük.
- Species Carex bengyana H.Lév. & L.C.Lamb.
- Species Carex benthamiana Boott accepted as Carex notha Kunth
- Species Carex berggrenii Petrie accepted as Carex talbotii Kottaim.
- Species Carex bergrothii Palmgr. accepted as Carex oederi var. bergrothii (Palmgr.) Hedrén & Lassen
- Species Carex beringiana Cham. ex Steud. accepted as Carex stylosa C.A.Mey.
- Species Carex bernardina Parish accepted as Carex diandra Schrank
- Species Carex berteroana É.Desv. accepted as Carex pungens Boeckeler
- Species Carex berteroana Hohen. ex Boott accepted as Carex pungens Boeckeler
- Species Carex bertolonii Schkuhr accepted as Carex divisa Huds.
- Species Carex bessarabica (Săvul. & Rayss) Zahar. accepted as Carex distans subsp. distans L.
- Species Carex beyrichiana Boeckeler accepted as Carex lurida Wahlenb.
- Species Carex bhutanica T.Koyama accepted as Carex haematostoma Nees
- Species Carex bicknellii E.G.Camus accepted as Carex annectens (E.P.Bicknell) E.P.Bicknell
- Species Carex biconvexis Michx. accepted as Carex lenticularis Michx.
- Species Carex biconvexis D.Don accepted as Carex phacota Spreng.
- Species Carex bicostata Olney
- Species Carex bicuspidata Regel ex V.I.Krecz. accepted as Carex melanostachya M.Bieb. ex Willd.
- Species Carex bidentula Franch. accepted as Carex augustinowiczii var. augustinowiczii Meinsh.
- Species Carex bifida Boott accepted as Carex serratodens S.Watson
- Species Carex biformis F.W.Schultz accepted as Carex hostiana DC.
- Species Carex bifurca Moench accepted as Carex riparia Curtis
- Species Carex bifurca Schrank accepted as Carex rostrata var. rostrata Stokes
- Species Carex biharica Simonk.
- Species Carex biligularis DC. accepted as Carex laevigata Sm.
- Species Carex billingsii (O.W.Knight) Kirschb.
- Species Carex bina Schkuhr accepted as Carex distachya var. distachya Desf.
- Species Carex binata Poir. accepted as Carex parviflora Host
- Species Carex binderi Podp.
- Species Carex binensis Franch.
- Species Carex binerviformis (Holmboe) Prain accepted as Carex distans subsp. distans L.
- Species Carex binerviformis Holmboe accepted as Carex distans L.
- Species Carex binervis Dewey accepted as Carex laevigata Sm.
- Species Carex binnensis Kneuck. accepted as Carex aterrima subsp. aterrima Hoppe
- Species Carex bipartita F.Dietr. accepted as Carex bifida Roth ex Steud.
- Species Carex bipartita All. accepted as Carex simpliciuscula subsp. simpliciuscula Wahlenb.
- Species Carex bisexualis C.B.Clarke accepted as Carex capensis Thunb.
- Species Carex bishallii C.B.Clarke accepted as Carex nudata W.Boott
- Species Carex bispicata Hook. & Arn. accepted as Carex longirostrata subsp. longirostrata C.A.Mey.
- Species Carex blankinshipii Fernald accepted as Carex gynodynama Olney
- Species Carex blepharolepis Nelmes accepted as Carex commixta Steud.
- Species Carex blepharophora A.Gray accepted as Carex castanea Wahlenb.
- Species Carex blyttii F.Nyl. accepted as Carex disperma Dewey
- Species Carex boenninghauseniana Kunth accepted as Carex boenninghausiana Weihe
- Species Carex boenninghausiana Weihe
- Species Carex bogdanensis Zapał. accepted as Carex boenninghausiana Weihe
- Species Carex bogstadensis Kük.
- Species Carex boissieri Steud. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex bolina O.Lang
- Species Carex bolliana Boeckeler accepted as Carex complanata subsp. complanata Torr. & Hook.
- Species Carex bonariensis Schltdl. accepted as Carex fissa Mack.
- Species Carex bongardiana C.A.Mey. accepted as Carex vesicaria L.
- Species Carex bongardii Boott accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex boniana Boeckeler accepted as Carex breviculmis var. breviculmis R.Br.
- Species Carex boninensis Koidz. accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex boottiana Benth. ex Boott accepted as Carex picta Steud.
- Species Carex boottiana Hook. & Arn. accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex bordabensis Litv.
- Species Carex bordzilowskii V.I.Krecz. accepted as Carex liparocarpos subsp. bordzilowskii (V.I.Krecz.) T.V.Egorova
- Species Carex borealis O.Lang accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex borneensis C.B.Clarke
- Species Carex bornmulleri Kük. accepted as Carex melanostachya M.Bieb. ex Willd.
- Species Carex borotalicola Regel accepted as Carex pycnostachya Kar. & Kir.
- Species Carex bosoensis Yashiro
- Species Carex bouchardii P.A.Genty accepted as Carex danielis H.Lév.
- Species Carex bovina Howell accepted as Carex aperta Boott
- Species Carex brachyantherum Trautv. & C.A.Mey.
- Species Carex brachycephala Poepp. ex Boott accepted as Carex fuscula d'Urv.
- Species Carex brachyglossa Mack. accepted as Carex annectens (E.P.Bicknell) E.P.Bicknell
- Species Carex brachylepis Turcz. ex Besser accepted as Carex media R.Br.
- Species Carex brachylepis Turcz. ex Steud. accepted as Carex media R.Br.
- Species Carex brachyphylla Turcz. accepted as Carex melanocarpa Cham. ex Trautv.
- Species Carex brachypoda Holm accepted as Carex scopulorum var. bracteosa (L.H.Bailey) F.J.Herm.
- Species Carex brachyrhyncha Gsaller accepted as Carex ferruginea Scop.
- Species Carex brachysandra Franch. accepted as Carex thunbergii Steud.
- Species Carex brachystachya (Regel & Maack) Akiyama accepted as Carex capricornis Meinsh. ex Maxim.
- Species Carex bracteata Suter accepted as Carex mucronata All.
- Species Carex bracteata Giseke ex Boott accepted as Carex salina var. salina Wahlenb.
- Species Carex bracteosa Kunze ex Kunth accepted as Carex bracteosa (Kunze ex Rchb.) Kunth
- Species Carex bracteosa Schwein. accepted as Carex vulpinoidea Michx.
- Species Carex bracteosa Kunze accepted as Carex bracteosa (Kunze ex Rchb.) Kunth
- Species Carex brassii Nelmes accepted as Carex chlorosaccus C.B.Clarke
- Species Carex brazatana Boeckeler accepted as Carex cherokeensis Schwein.
- Species Carex bremurii Christ ex Meinsh. accepted as Carex umbrosa Host
- Species Carex brenneri Christ accepted as Carex brenneri Christ ex Scheutz
- Species Carex brenneri Christ ex Scheutz accepted as Carex sabynensis var. sabynensis Less. ex Kunth
- Species Carex breutelii Schnizl. ex Lange accepted as Carex canescens subsp. canescens L.
- Species Carex brevibracteata K.Schum. ex Miyabe & Kudô
- Species Carex brevicaulis Mack. accepted as Carex zikae Roalson & Waterway
- Species Carex breviceps Kük. accepted as Carex oligostachya Nees
- Species Carex breviculmis Thwaites accepted as Carex hebecarpa C.A.Mey.
- Species Carex brevifolia Host accepted as Carex ferruginea Scop.
- Species Carex breviglumis Le Gall accepted as Carex trinervis Degl.
- Species Carex breviglumis Ridl. accepted as Carex borneensis C.B.Clarke
- Species Carex breviligulata Mack. accepted as Carex densa (L.H.Bailey) L.H.Bailey
- Species Carex brevipes S.Watson accepted as Carex rossii Boott
- Species Carex brevipes W.Boott ex B.D.Jacks. accepted as Carex rossii Boott
- Species Carex brevirostrata Poir. accepted as Carex liparocarpos subsp. liparocarpos Gaudin
- Species Carex brevirostris Cederstr. accepted as Carex gaudiniana Guthnick
- Species Carex brevirostris Blytt accepted as Carex gaudiniana Guthnick
- Species Carex brevis S.T.Blake accepted as Carex breviculmis var. perciliata Kük.
- Species Carex brevisquama Mack. accepted as Carex vallicola Dewey
- Species Carex brittoniana J.M.Coult. accepted as Carex tetrastachya Scheele
- Species Carex brizoides Geners. accepted as Carex leporina L.
- Species Carex brizoides Huds. accepted as Carex canescens subsp. canescens L.
- Species Carex brizopyrum Kunze accepted as Carex alta Boott
- Species Carex brongniartii L.H.Bailey accepted as Carex densa (L.H.Bailey) L.H.Bailey
- Species Carex broteriana Samp. accepted as Carex reuteriana subsp. reuteriana Boiss.
- Species Carex brotherorum Christ accepted as Carex vulpina L.
- Species Carex brownei Steud. accepted as Carex longibrachiata Boeckeler
- Species Carex bruceana Boott ex C.B.Clarke accepted as Carex continua C.B.Clarke
- Species Carex brueckneri Kük. accepted as Carex tomentosa L.
- Species Carex brueggeri K.Richt. accepted as Carex fulva Gooden.
- Species Carex brunnescens Boeckeler accepted as Carex crassiflora Kük.
- Species Carex bucculenta V.I.Krecz. accepted as Carex maritima Gunnerus
- Species Carex buchananii C.B.Clarke accepted as Carex kukkoneniana Luceño & Martín-Bravo
- Species Carex buchtienii Palla
- Species Carex buckleyi Dewey accepted as Carex brunnescens subsp. sphaerostachya (Tuck.) Kalela
- Species Carex buennemeijeri Nelmes accepted as Carex rafflesiana Boott
- Species Carex bufonia Gueldenst. ex Trevir.
- Species Carex bukaensis Palla accepted as Carex oligostachya Nees
- Species Carex bulbosa Drejer accepted as Carex flacca subsp. flacca Schreb.
- Species Carex bulbosa Boeckeler accepted as Carex ignota Dewey
- Species Carex bulbostylis Kük. accepted as Carex breviculmis var. montivaga (S.T.Blake) Noot.
- Species Carex bulgarica Velen. accepted as Carex digitata L.
- Species Carex bulgarica (Domin) Lazare accepted as Carex lazarei Jac.Koopman, Niketic, Wieclaw & Govaerts
- Species Carex bullata Elliott accepted as Carex striata Michx.
- Species Carex bullata Dewey accepted as Carex tuckermanii Dewey
- Species Carex bullockiana Nelmes accepted as Carex pairae F.W.Schultz
- Species Carex bungeana Debeaux accepted as Carex heterostachya Bunge
- Species Carex burejana Meinsh. accepted as Carex drymophila Turcz.
- Species Carex burjatorum Korotky
- Species Carex buruensis Nelmes accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex buschiorum V.I.Krecz. ex Kolak. accepted as Carex humilis var. humilis Leyss.
- Species Carex caesariensis Mack.
- Species Carex caesia Griseb. accepted as Carex tomentosa L.
- Species Carex caespitosa L. accepted as Carex cespitosa L.
- Species Carex caespitosa Ten. accepted as Carex frigida All.
- Species Carex caflischii Brügger accepted as Carex echinata subsp. echinata Murray
- Species Carex cajanderi Kük. accepted as Carex bonanzensis Britton
- Species Carex calbucana Phil. accepted as Carex fuscula d'Urv.
- Species Carex calcarea Melnikov accepted as Carex borealipolaris S.R.Zhang
- Species Carex calcitrapa Franch. accepted as Carex maackii Maxim.
- Species Carex calderae A.Hansen accepted as Carex paniculata subsp. calderae (A.Hansen) Lewej. & Lobin
- Species Carex calderi B.Boivin accepted as Carex heterophyta Holmb.
- Species Carex campestris Host accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex camporum Mack. accepted as Carex praegracilis W.Boott
- Species Carex camptoglochim V.I.Krecz. accepted as Carex camptoglochin V.I.Krecz.
- Species Carex camptotropa V.I.Krecz. accepted as Carex maritima Gunnerus
- Species Carex campylocarpa Holm accepted as Carex scopulorum var. bracteosa (L.H.Bailey) F.J.Herm.
- Species Carex campylorhina V.I.Krecz. accepted as Carex auriculata Franch.
- Species Carex campyloxys Steud. accepted as Carex aematorrhyncha var. aematorhyncha Desv.
- Species Carex camschatcense Kunth accepted as Carex longirostrata subsp. longirostrata C.A.Mey.
- Species Carex camtschatcensis Kunth accepted as Carex longirostrata C.A.Mey.
- Species Carex canadensis Dewey accepted as Carex lupulina Muhl. ex Willd.
- Species Carex canaliculata P.C.Li accepted as Carex oxyphylla Franch.
- Species Carex candolleana H.Lév. & Vaniot
- Species Carex candriani Kneuck.
- Species Carex canescens Huds. accepted as Carex divulsa Stokes
- Species Carex canescens Leers accepted as Carex leersii F.W.Schultz
- Species Carex cantabrorum Gand. accepted as Carex asturica Boiss.
- Species Carex capensis Schkuhr accepted as Carex capensis Thunb.
- Species Carex capillata Schkuhr ex Kunth accepted as Carex hirsutella Mack.
- Species Carex capillipes Drejer accepted as Carex lyngbyei Hornem.
- Species Carex capitellata Boeckeler accepted as Carex phalaroides Kunth
- Species Carex capitulata Boott ex C.B.Clarke accepted as Carex oligostachya Nees
- Species Carex capituliformis Meinsh. ex Maxim. accepted as Carex onoei Franch. & Sav.
- Species Carex cardioglochis H.Lév. & Vaniot accepted as Carex otaruensis Franch.
- Species Carex cardrona Hamlin accepted as Carex uncifolia Cheeseman
- Species Carex caricina (D.Don) Ghildyal & U.C.Bhattach. accepted as Carex filicina Nees
- Species Carex cariei Aubin
- Species Carex carlantoniana J.Gay accepted as Carex enervis C.A.Mey.
- Species Carex carltonia Dewey accepted as Carex heleonastes Ehrh. ex L.f.
- Species Carex carltoniana Dewey accepted as Carex heleonastes subsp. heleonastes Ehrh. ex L.f.
- Species Carex carniolica Wulfen accepted as Carex brizoides L.
- Species Carex caroliniana Buckley accepted as Carex austrocaroliniana L.H.Bailey
- Species Carex caryophyllaea J.F.Gmel. accepted as Carex montana L.
- Species Carex caryophyllata Kunth accepted as Carex montana L.
- Species Carex castanea Miel. ex Saut. accepted as Carex atrata subsp. atrata L.
- Species Carex castanea Elliott accepted as Carex elliottii Schwein. & Torr.
- Species Carex castaneopsis Landolt accepted as Carex ornithopoda subsp. ornithopoda Willd.
- Species Carex castellanosii Barros accepted as Carex vallis-pulchrae subsp. vallis-pulchrae Phil.
- Species Carex casteriana Heer ex Boott accepted as Carex dioica L.
- Species Carex castriferrei Waisb.
- Species Carex catteyensis A.Benn. accepted as Carex rostrata var. rostrata Stokes
- Species Carex caucasigena Melnikov accepted as Carex deasyi (C.B.Clarke) O.Yano & S.R.Zhang
- Species Carex caudatifrons (Akiyama) Akiyama accepted as Carex flavocuspis Franch. & Sav.
- Species Carex caulorrhiza H.Lév. & Vaniot accepted as Carex middendorffii var. kirigaminensis (Ohwi) Ohwi
- Species Carex cavaleriei H.Lév. & Vaniot accepted as Carex sampsonii Hance
- Species Carex cayouettei A.Bergeron
- Species Carex celsa (L.H.Bailey) Piper accepted as Carex hassei L.H.Bailey
- Species Carex celsa Boott accepted as Carex psychrophila Nees
- Species Carex cenantha A.E.Kozhevn.
- Species Carex cenisia Balb. accepted as Carex bicolor Bellardi ex All.
- Species Carex cephalantha (L.H.Bailey) E.P.Bicknell accepted as Carex echinata subsp. echinata Murray
- Species Carex cephaloidea Dewey accepted as Carex cephaloidea (Dewey) Dewey ex Boott
- Species Carex ceramica Nelmes accepted as Carex rafflesiana Boott
- Species Carex cerina Dumort. accepted as Carex trinervis Degl.
- Species Carex cernua J.F.Gmel.
- Species Carex cernua Raeusch.
- Species Carex cernua Boott accepted as Carex dimorpholepis Steud.
- Species Carex cernua Phil. accepted as Carex magellanica subsp. magellanica Lam.
- Species Carex cesanensis (Molina Gonz., Acedo & Llamas) Landolt accepted as Carex muricata subsp. cesanensis Molina Gonz., Acedo & Llamas
- Species Carex cetica Rech.
- Species Carex chabertii F.W.Schultz accepted as Carex leersii F.W.Schultz
- Species Carex chaetogyne Nelmes accepted as Carex fedia Nees
- Species Carex chaetophylla Steud. accepted as Carex divisa Huds.
- Species Carex chaetorhiza Franch. & Sav. accepted as Carex arenicola F.Schmidt
- Species Carex chaffanjonii E.G.Camus accepted as Carex sedakowii C.A.Mey. ex Meinsh.
- Species Carex chalaros Steud. accepted as Carex granularis Muhl. ex Willd.
- Species Carex chalcodeta V.I.Krecz. accepted as Carex pallescens L.
- Species Carex chamarensis T.V.Egorova accepted as Carex heterolepis Bunge
- Species Carex chamissoi Boeckeler accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex chamissonis Meinsh. accepted as Carex krauseorum subsp. krauseorum Boeckeler
- Species Carex changmuensis Tang & F.T.Wang ex Y.C.Yang accepted as Carex oxyphylla Franch.
- Species Carex chaofangii C.Z.Zheng & X.F.Jin accepted as Carex phoenicis Dunn
- Species Carex chapmanii Torr. ex Boott accepted as Carex baltzellii Chapm.
- Species Carex chapmanii Sartwell ex Dewey accepted as Carex tenax Chapm. ex Dewey
- Species Carex chapmanii Sartwell ex L.H.Bailey accepted as Carex tenax Chapm. ex Dewey
- Species Carex charkeviczii A.E.Kozhevn. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex chatenieri H.Lév.
- Species Carex cheesemanii Petrie accepted as Carex comans Berggr.
- Species Carex cheilungkiangnica A.I.Baranov & Skvortsov accepted as Carex cinerascens Kük.
- Species Carex chevalieri Corb. accepted as Carex xanthocarpa Degl.
- Species Carex chienii F.T.Wang & Tang accepted as Carex adrienii E.G.Camus
- Species Carex chihuahuensis Mack. accepted as Carex agrostoides Mack.
- Species Carex chilosacca C.B.Clarke accepted as Carex maculata Boott
- Species Carex chilosaccus C.B.Clarke accepted as Carex maculata Boott
- Species Carex chimaphila Holm accepted as Carex scopulorum var. scopulorum Holm
- Species Carex chinensis Munro ex Hook.f. accepted as Carex munroi Boott ex C.B.Clarke
- Species Carex chionophila Holm accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex chishimana Ohwi accepted as Carex glareosa subsp. glareosa Schkuhr ex Wahlenb.
- Species Carex chitralensis Nelmes accepted as Carex koshewnikowii subsp. chitralensis (Nelmes) Dickoré
- Species Carex chlamydea Norman accepted as Carex dioica L.
- Species Carex chlorocarpa Wimm. accepted as Carex nigra subsp. alpina (Gaudin) Lemke
- Species Carex chlorocarpos Liebm. accepted as Carex anisostachys Liebm.
- Species Carex chlorocystis Boeckeler accepted as Carex harlandii subsp. harlandii Boott
- Species Carex chlorolepis Steud. accepted as Carex phalaroides Kunth
- Species Carex chloroleuca Meinsh. accepted as Carex amgunensis F.Schmidt
- Species Carex chlorophila Mack. accepted as Carex oederi var. oederi Retz.
- Species Carex chlorostachys D.Don accepted as Carex doniana Spreng.
- Species Carex chorda H.Lév. & Vaniot accepted as Carex rhynchophora var. chorda (H.Lév. & Vaniot) X.F.Jin
- Species Carex chorgosica Meinsh. accepted as Carex diluta M.Bieb.
- Species Carex christii Boeckeler
- Species Carex christyana Boott accepted as Carex cherokeensis Schwein.
- Species Carex chrysites Link
- Species Carex chrysoleuca Holm accepted as Carex densa (L.H.Bailey) L.H.Bailey
- Species Carex chuana F.T.Wang & Tang ex P.C.Li
- Species Carex chubutensis C.B.Clarke accepted as Carex subantarctica Speg.
- Species Carex chuniana F.T.Wang & Tang accepted as Carex commixta Steud.
- Species Carex ciliaris Fernald accepted as Carex longicaulis Boeckeler
- Species Carex ciliata Willd. accepted as Carex ericetorum Pollich
- Species Carex ciliatifructus Ohwi
- Species Carex ciliolata Franch. accepted as Carex scita var. riishirensis (Franch.) Kük.
- Species Carex cincta Franch. accepted as Carex phacota Spreng.
- Species Carex cinerea Pollich accepted as Carex canescens subsp. canescens L.
- Species Carex cinnamomea Cheeseman accepted as Carex forsteri Wahlenb.
- Species Carex cinnamomea Olney accepted as Carex mendocinensis Olney ex Boott
- Species Carex cinnamomea Boott accepted as Carex nivalis Boott
- Species Carex cladostachya Wahlenb. accepted as Carex polystachya var. polystachya Sw. ex Wahlenb.
- Species Carex clandestina Gooden. accepted as Carex humilis var. humilis Leyss.
- Species Carex clarkeana Kük. accepted as Carex rafflesiana Boott
- Species Carex clausa Holmb.
- Species Carex clavaeformis Hoppe accepted as Carex flacca subsp. flacca Schreb.
- Species Carex clavaudiana (Rouy) Prain accepted as Carex pseudobrizoides Clavaud
- Species Carex clavaudiana Rouy accepted as Carex pseudobrizoides Clavaud
- Species Carex clemensii Kük. accepted as Carex perakensis var. borneensis (C.B.Clarke) Noot.
- Species Carex clivicola Fernald & Weath. accepted as Carex peckii Howe
- Species Carex coacta Boott accepted as Carex divisa Huds.
- Species Carex coarctata Kit. accepted as Carex divisa Huds.
- Species Carex cobresiiformis A.I.Baranov & Skvortsov accepted as Carex alascana Boeckeler
- Species Carex cokae Podp. accepted as Carex turfosa Fr.
- Species Carex colchaguensis Kük. accepted as Carex pungens Boeckeler
- Species Carex colchaguensis Phil. accepted as Carex pungens Boeckeler
- Species Carex collata Boott accepted as Carex appressa R.Br.
- Species Carex collecta Dewey accepted as Carex albicans var. albicans Willd. ex Spreng.
- Species Carex collifera Ohwi accepted as Carex canina subsp. collifera (Ohwi) X.F.Jin
- Species Carex collina Willd. accepted as Carex montana L.
- Species Carex collumanthus (Steyerm.) G.A.Wheeler accepted as Carex collumanthus (Steyerm.) L.E.Mora
- Species Carex colorata Mack. accepted as Carex woodii Dewey
- Species Carex columbiana Dewey accepted as Carex mertensii var. mertensii J.D.Prescott ex Bong.
- Species Carex comari H.Lév. & Vaniot accepted as Carex frigida All.
- Species Carex commersoniana Sieber ex Kunth accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex commutata Turcz. accepted as Carex pycnostachya Kar. & Kir.
- Species Carex commutata J.Gay accepted as Carex stricta Lam.
- Species Carex compacta (R.Br.) Poir. accepted as Carex austrocompacta K.L.Wilson
- Species Carex compacta Wimm. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex compacta R.Br. accepted as Carex membranacea Hook.
- Species Carex compacta Krock. ex Hoppe accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex compacta Lam. accepted as Carex vulpina L.
- Species Carex compacta Dewey accepted as Carex saxatilis L.
- Species Carex compressa Vahl ex Kunth accepted as Carex bonariensis var. bonariensis Desf. ex Poir.
- Species Carex compressa Kit. ex Willd. accepted as Carex brachystachys Schrank
- Species Carex compressa Hosé accepted as Carex canescens subsp. canescens L.
- Species Carex compressa Gaudin accepted as Carex elata subsp. elata All.
- Species Carex concolor R.Br. accepted as Carex aquatilis var. minor Boott
- Species Carex concolor Nees accepted as Carex speciosa subsp. speciosa Kunth
- Species Carex confertospicata Boeckeler accepted as Carex livida (Wahlenb.) Willd.
- Species Carex confusa Hamlin accepted as Carex geminata Schkuhr
- Species Carex congesta C.A.Mey. ex Boott accepted as Carex hoodii Boott
- Species Carex conglobata All. accepted as Carex montana L.
- Species Carex conglobata Kit. ex Willd. accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex conglobata Kit. accepted as Carex prolifera Kit.
- Species Carex conglomerata Reznicek
- Species Carex conjugata Willd. ex Kunth accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex connectens Holmb.
- Species Carex conoidea Muhl. accepted as Carex laxiflora var. laxiflora Lam.
- Species Carex conoides Kük.
- Species Carex conorrhyncha Nelmes accepted as Carex breviculmis var. breviculmis R.Br.
- Species Carex consimilis Holm accepted as Carex bigelowii subsp. lugens (Holm) T.V.Egorova
- Species Carex consocialis Steud. accepted as Carex doniana Spreng.
- Species Carex consors C.B.Clarke accepted as Carex tuberculata Liebm.
- Species Carex constricta S.T.Blake accepted as Carex celebica Kük.
- Species Carex contigua Hoppe accepted as Carex spicata subsp. spicata Huds.
- Species Carex contracta Boeckeler accepted as Carex satsumensis Franch. & Sav.
- Species Carex convexa Kit. accepted as Carex echinata subsp. echinata Murray
- Species Carex convoluta Mack. accepted as Carex rosea Willd.
- Species Carex cooleyi Dewey accepted as Carex hystericina Muhl. ex Willd.
- Species Carex cooptanda C.B.Clarke accepted as Carex lachenalii subsp. lachenalii Schkuhr
- Species Carex copulata (L.H.Bailey) Mack. accepted as Carex laxiculmis var. copulata (L.H.Bailey) Fernald
- Species Carex corcontica Domin accepted as Carex connectens Holmb.
- Species Carex coreana L.H.Bailey accepted as Carex dickinsii Franch. & Sav.
- Species Carex coronata H.Lév. accepted as Carex dispalata subsp. dispalata Boott
- Species Carex corralensis Phil. accepted as Carex aematorrhyncha var. corralensis (Phil.) Kük.
- Species Carex corsica Degl. accepted as Carex microcarpa Bertol. ex Moris
- Species Carex corsicana Link accepted as Carex punctata Gaudin
- Species Carex corstorphinei Druce
- Species Carex corynophora Peterm. accepted as Carex acuta L.
- Species Carex costata Turcz. ex Trevir. accepted as Carex korshinskyi Kom.
- Species Carex costata J.Presl & C.Presl accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex costata Schwein. accepted as Carex virescens Muhl. ex Willd.
- Species Carex costei Rouy
- Species Carex costellata Britton accepted as Carex virescens Muhl. ex Willd.
- Species Carex cousturieri Gand. accepted as Carex leporina L.
- Species Carex crandallii Gand. accepted as Carex micropoda C.A.Mey.
- Species Carex crassa Ehrh. accepted as Carex riparia Curtis
- Species Carex crassicaulis Franch. accepted as Carex foliosissima var. foliosissima F.Schmidt
- Species Carex crassinervia Franch. accepted as Carex meyeriana Kunth
- Species Carex crawei Dewey accepted as Carex crawei Dewey ex Torr.
- Species Carex crepinii Torges
- Species Carex crinigera Boott accepted as Carex ramosa Schkuhr. ex Willd.
- Species Carex crinitoides Lepage
- Species Carex cristata Schwein. accepted as Carex cristatella Britton
- Species Carex cristata Clairv. accepted as Carex ferruginea Scop.
- Species Carex cruciata Nees accepted as Carex cruciata Wahlenb.
- Species Carex crustacea Nelmes accepted as Carex alligata Boott
- Species Carex cryptandra Franch. & Sav. accepted as Carex macroglossa Franch. & Sav.
- Species Carex cryptantha Holm accepted as Carex glareosa subsp. glareosa Schkuhr ex Wahlenb.
- Species Carex cryptocarpa Cheeseman accepted as Carex decurtata Cheeseman
- Species Carex cryptocarpa C.A.Mey. accepted as Carex lyngbyei Hornem.
- Species Carex cryptochlaena Holm
- Species Carex cseteii Nyman
- Species Carex cumingiana Steud. accepted as Carex oligostachya Nees
- Species Carex cuneata Ohwi accepted as Carex stenostachys var. cuneata (Ohwi) Ohwi & T.Koyama
- Species Carex cunninghamii Boott accepted as Carex acuta L.
- Species Carex cuprea (Kük.) Nelmes accepted as Carex petitiana subsp. petitiana A.Rich.
- Species Carex cuprina (Sándor ex Heuff.) Nendtv. ex A.Kern. accepted as Carex leersii F.W.Schultz
- Species Carex curaica Franch. & Sav. accepted as Carex arenicola F.Schmidt
- Species Carex curta Gooden. accepted as Carex canescens L.
- Species Carex curtiglumis C.B.Clarke accepted as Carex augustinowiczii var. augustinowiczii Meinsh.
- Species Carex curtisii Ridl. accepted as Carex breviscapa C.B.Clarke
- Species Carex curvata Boott accepted as Carex bonatiana (Kük.) N.A.Ivanova
- Species Carex curvifolia Boeckeler accepted as Carex macrorrhiza Boeckeler
- Species Carex curvirostra Hartm. accepted as Carex vaginata var. vaginata Tausch
- Species Carex curvirostris Kunze accepted as Carex baccans Nees
- Species Carex curvula Willd. ex Kunth accepted as Carex davalliana Sm.
- Species Carex curvula Lam. accepted as Carex praecox Schreb.
- Species Carex cuspidata Bertol. accepted as Carex divisa Huds.
- Species Carex cuspidata Host accepted as Carex flacca subsp. erythrostachys (Hoppe) Holub
- Species Carex cuspidata Wahlenb. accepted as Carex halophila var. halophila F.Nyl.
- Species Carex custoriana Heer accepted as Carex dioica L.
- Species Carex cyclocarpa Holm accepted as Carex bigelowii subsp. lugens (Holm) T.V.Egorova
- Species Carex cyclocystis Boeckeler accepted as Carex orbicularis subsp. orbicularis Boott
- Species Carex cylindrica Miel. ex Kunth accepted as Carex atrata subsp. atrata L.
- Species Carex cylindrica Schwein. accepted as Carex bullata Willd.
- Species Carex cylindricus Chapm. accepted as Cyperus cylindricus Chapm.
- Species Carex cyouensis X.Y.Mao & Y.C.Yang
- Species Carex cyperoidea Houtt. accepted as Carex bohemica Schreb.
- Species Carex cyperoides L. accepted as Carex bohemica Schreb.
- Species Carex cyperoides Murray accepted as Carex bohemica Schreb.
- Species Carex cyrtosaccus C.B.Clarke accepted as Carex vallis-rosetto K.Schum.
- Species Carex czarwakensis Litv. accepted as Carex diluta M.Bieb.
- Species Carex czetzii Janka accepted as Carex montana L.
- Species Carex daibuensis Hayata accepted as Carex vacillans Drejer
- Species Carex danaensis Stacey accepted as Carex incurviformis Mack.
- Species Carex dandoensis T.Koyama
- Species Carex danielis H.Lév.
- Species Carex darlingtonii Schwein. ex M.A.Curtis accepted as Carex aestivalis M.A.Curtis ex A.Gray
- Species Carex davisii Dewey accepted as Carex albicans var. emmonsii (Dewey ex Torr.) Rettig
- Species Carex dayunshanensis L.K.Ling & Y.Z.Huang accepted as Carex graciliflora Dunn
- Species Carex deamii F.J.Herm.
- Species Carex debiliformis Mack. accepted as Carex mendocinensis Olney ex Boott
- Species Carex debilis Boiss. & Balansa accepted as Carex depressa subsp. transsilvanica (Schur) K.Richt.
- Species Carex debilis G.Forst. accepted as Carex forsteri Wahlenb.
- Species Carex decaulescens V.I.Krecz. accepted as Carex popovii subsp. popovii V.I.Krecz.
- Species Carex decipiens J.Gay accepted as Carex macrostyla Lapeyr.
- Species Carex decipiens Turcz. accepted as Carex obtusata Lilj.
- Species Carex decolorans Wimm.
- Species Carex decumbens Moench accepted as Carex caryophyllea Latourr.
- Species Carex decumbens Ehrh. accepted as Carex pilulifera subsp. pilulifera L.
- Species Carex decurticaulis Ohwi accepted as Carex reptabunda (Trautv.) V.I.Krecz.
- Species Carex deinbolliana J.Gay
- Species Carex delicatula Lojac.
- Species Carex delicatula E.P.Bicknell accepted as Carex atlantica subsp. capillacea (L.H.Bailey) Reznicek
- Species Carex delicatula C.B.Clarke accepted as Carex lanceolata var. lanceolata Boott
- Species Carex dematranea Lagger accepted as Carex turfosa Fr.
- Species Carex densenervosa Chiov. accepted as Carex spartea Wahlenb.
- Species Carex densiflora J.Presl & C.Presl accepted as Carex cirrhulosa Nees
- Species Carex denudata Lapeyr. ex Steud. accepted as Carex pyrenaica subsp. pyrenaica Wahlenb.
- Species Carex depauperata Curtis ex With. accepted as Carex depauperata Curtis ex Woodw.
- Species Carex depauperata Hornem. accepted as Carex vaginata var. vaginata Tausch
- Species Carex descendens Kük.
- Species Carex deserta Merino
- Species Carex desertorum (Litv.) Litv. accepted as Carex pachystylis J.Gay
- Species Carex despreauxii Steud. accepted as Carex oligosperma Michx.
- Species Carex dessaueri Phil. accepted as Carex banksii var. banksii Boott
- Species Carex deweyi Eaton accepted as Carex deweyana var. deweyana Schwein.
- Species Carex diamantina H.Lév. & Vaniot accepted as Carex forficula Franch. & Sav.
- Species Carex diandra Roth accepted as Carex paniculata subsp. paniculata L.
- Species Carex diaphana Boott accepted as Carex appressa R.Br.
- Species Carex dichroa V.I.Krecz. accepted as Carex pamirensis subsp. dichroa Malyschev
- Species Carex dichroa Franch. accepted as Carex thibetica var. thibetica Franch.
- Species Carex dichroandra V.I.Krecz. accepted as Carex acuta L.
- Species Carex diclina Phil. accepted as Carex gayana Desv.
- Species Carex dicraea C.B.Clarke accepted as Carex doenitzii Boeckeler
- Species Carex dicuspis Franch. accepted as Carex doenitzii Boeckeler
- Species Carex dieckii Boeckeler accepted as Carex illota L.H.Bailey
- Species Carex diehlii M.E.Jones ex F.J.Herm. accepted as Carex lagunensis M.E.Jones
- Species Carex dietrichiae Boeckeler accepted as Carex indica var. indica L.
- Species Carex diffusa Boott ex C.B.Clarke accepted as Carex vesiculosa Boott
- Species Carex diffusus Vahl accepted as Cyperus diffusus Vahl
- Species Carex digama Nakai accepted as Carex conica var. conica Boott
- Species Carex digitalis Schwein. & Torr. accepted as Carex gracillima Schwein.
- Species Carex digyna (Kük.) Tang & F.T.Wang accepted as Carex przewalskii T.V.Egorova
- Species Carex digyne TANG & WANG accepted as Carex przewalskii T.V.Egorova
- Species Carex dimorpha Brot. accepted as Carex distachya var. distachya Desf.
- Species Carex dimorpha Boeckeler accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex dimorphotheca Stschegl. accepted as Carex stenophylla subsp. stenophylloides (V.I.Krecz.) T.V.Egorova
- Species Carex dinarica (Heuff.) Simonk. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex dineuros C.B.Clarke accepted as Carex jaluensis Kom.
- Species Carex dioicotrigona St.-Lag. accepted as Carex davalliana Sm.
- Species Carex dioiscostrongyla St.-Lag. accepted as Carex dioica L.
- Species Carex diplasiocarpa V.I.Krecz. accepted as Carex yamatsutana Ohwi
- Species Carex discessa V.I.Krecz. ex Grubov accepted as Carex stenophylla subsp. stenophylloides (V.I.Krecz.) T.V.Egorova
- Species Carex discolor Reinw. ex de Vriese accepted as Carex appressa R.Br.
- Species Carex discolor Boeckeler accepted as Carex conica var. conica Boott
- Species Carex discolor F.Nyl. accepted as Carex salina var. salina Wahlenb.
- Species Carex disjuncta (Fernald) E.P.Bicknell accepted as Carex canescens subsp. disjuncta (Fernald) Toivonen
- Species Carex dispalatha H.Lév. & Vaniot accepted as Carex planiculmis Kom.
- Species Carex disperma Kunth accepted as Carex jamesii Schwein.
- Species Carex disperma Kunze ex J.Carey accepted as Carex rosea Willd.
- Species Carex displodensis Printz accepted as Carex delicata C.B.Clarke
- Species Carex dissitispicula Ohwi accepted as Carex kujuzana Ohwi
- Species Carex distachya Willd. accepted as Carex atrata subsp. atrata L.
- Species Carex distans Lightf. accepted as Carex binervis Sm.
- Species Carex distantiflora Nakai accepted as Carex oxyphylla Franch.
- Species Carex distenta Kunze ex Kunth accepted as Carex fuscula d'Urv.
- Species Carex disticha A.Gray accepted as Carex sartwellii var. sartwellii Dewey
- Species Carex distichiflora B.Boivin accepted as Carex petricosa var. petricosa Dewey
- Species Carex distichoidea H.Lév. & Vaniot accepted as Carex lithophila Turcz.
- Species Carex divaricata Kük. accepted as Carex mollissima Christ ex Scheutz
- Species Carex divergens Thuill. accepted as Carex elongata L.
- Species Carex diversicolor Crantz accepted as Carex flacca subsp. erythrostachys (Hoppe) Holub
- Species Carex diversiflora Host accepted as Carex halleriana Asso
- Species Carex diversistylis A.Roach accepted as Carex rossii Boott
- Species Carex dives Holm accepted as Carex aquatilis var. dives (Holm) Kük.
- Species Carex divisa Oeder accepted as Carex oederi var. oederi Retz.
- Species Carex divulsa Gaudin accepted as Carex muricata L.
- Species Carex doiana Akiyama accepted as Carex conica var. conica Boott
- Species Carex dolichogyne T.Koyama accepted as Carex truncatigluma C.B.Clarke
- Species Carex dolicophylla Link ex C.B.Clarke accepted as Carex baccans Nees
- Species Carex dominii H.Lév. & Vaniot accepted as Carex disperma Dewey
- Species Carex dominii Levl. & Vaniot accepted as Carex disperma Dewey
- Species Carex doroyuensis K.Nagas., S.Sakag. & K.Sawa
- Species Carex drakensbergensis C.B.Clarke accepted as Carex cognata Kunth
- Species Carex drejeri O.Lang accepted as Carex cespitosa L.
- Species Carex drejeriana Lange accepted as Carex bigelowii subsp. bigelowii Torr. ex Schwein.
- Species Carex drummondiana Dewey accepted as Carex rupestris subsp. rupestris All.
- Species Carex drymeia L.f. accepted as Carex sylvatica subsp. sylvatica Huds.
- Species Carex dubia Missbach & E.H.L.Krause
- Species Carex dubia Hosé accepted as Carex acutiformis Ehrh.
- Species Carex dubia Gaudin accepted as Carex atrata subsp. atrata L.
- Species Carex dubitata Dewey ex Boott accepted as Carex bigelowii subsp. bigelowii Torr. ex Schwein.
- Species Carex ducellieri Beauverd
- Species Carex dudleyi Mack. accepted as Carex densa (L.H.Bailey) L.H.Bailey
- Species Carex dueensis Meinsh. accepted as Carex blepharicarpa Franch.
- Species Carex duereriana Kük.
- Species Carex duerrnbergeri Ritzb. accepted as Carex alba Scop.
- Species Carex dufftii Hausskn.
- Species Carex dufourei Lapeyr. accepted as Carex rupestris subsp. rupestris All.
- Species Carex dumanii Lepage
- Species Carex dunniana H.Lév. accepted as Carex ligulata Nees
- Species Carex dunnii Hayata accepted as Carex perakensis var. perakensis C.B.Clarke
- Species Carex dura Boott accepted as Carex pichinchensis Kunth
- Species Carex durandii Boeckeler accepted as Carex bonplandii Kunth
- Species Carex durieui (F.W.Schultz) F.W.Schultz accepted as Carex leersii F.W.Schultz
- Species Carex durifolia L.H.Bailey accepted as Carex backii Boott
- Species Carex duriusculiformis V.I.Krecz. accepted as Carex stenophylla subsp. stenophylloides (V.I.Krecz.) T.V.Egorova
- Species Carex dussiana Boeckeler accepted as Carex polystachya var. polystachya Sw. ex Wahlenb.
- Species Carex duthiei C.B.Clarke accepted as Carex gracilenta Boott ex Boeckeler
- Species Carex dutillyi O'Neill & Duman accepted as Carex langeana Fernald
- Species Carex eastwoodiana Stacey accepted as Carex tahoensis Smiley
- Species Carex eboracensis Nelmes accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex ebracteata Phil. accepted as Carex aphylla Kunth
- Species Carex ebracteata Trautv. accepted as Carex trautvetteriana Kom.
- Species Carex echinata Lam. accepted as Carex flava L.
- Species Carex echinata Desf. accepted as Carex hispida Willd. ex Schkuhr
- Species Carex echinochloiformis Y.L.Chang ex Y.C.Yang accepted as Carex wallichiana Spreng.
- Species Carex echinocloe Huds.
- Species Carex efflata Laest. ex Trevir. accepted as Carex panicea L.
- Species Carex egena H.Lév. & Vaniot accepted as Carex filipes var. oligostachys Kük.
- Species Carex eggertii L.H.Bailey accepted as Carex louisianica L.H.Bailey
- Species Carex eggytera Steud. accepted as Carex breviculmis var. breviculmis R.Br.
- Species Carex egregia Mack. accepted as Carex angustata Boott
- Species Carex ehrenbergiana Boeckeler accepted as Carex tuberculata Liebm.
- Species Carex ehrhartiana Hoppe ex Boott accepted as Carex diandra Schrank
- Species Carex elachycarpa Fernald accepted as Carex sterilis Willd.
- Species Carex elanescens Cif. & Giacom.
- Species Carex elata Lowe accepted as Carex lowei Bech.
- Species Carex elbertiana Kelso accepted as Carex nova L.H.Bailey
- Species Carex elbursensis Gilli accepted as Carex songorica Kar. & Kir.
- Species Carex elegans Willd. accepted as Carex limosa L.
- Species Carex eleocharis L.H.Bailey accepted as Carex duriuscula subsp. duriuscula C.A.Mey.
- Species Carex eleopsammodes Steud. accepted as Carex andersonii Boott
- Species Carex elibates Nelmes accepted as Carex maculata Boott
- Species Carex elisabethae J.Andres, Carbo, Llamas & M.Perez
- Species Carex elmeri Kük. accepted as Carex blinii H.Lév. & Vaniot
- Species Carex elrodii M.E.Jones accepted as Carex parryana Dewey
- Species Carex elyniformis A.E.Porsild accepted as Carex nardina var. nardina (Hornem.) Fr.
- Species Carex emarcida Suter accepted as Carex sylvatica subsp. sylvatica Huds.
- Species Carex emarginata Willd. accepted as Carex montana L.
- Species Carex emasculata V.I.Krecz. accepted as Carex hartmaniorum A.Cajander
- Species Carex emirnensis Baker accepted as Carex rutenbergiana Boeckeler
- Species Carex emmae L.Gross
- Species Carex emmanuelis Luceño accepted as Carex torgesiana Kük.
- Species Carex emmonsii Dewey ex Torr. accepted as Carex albicans var. emmonsii (Dewey ex Torr.) Rettig
- Species Carex emodorum Spreng. accepted as Carex alopecuroides D.Don ex Tilloch & Taylor
- Species Carex enervis Dulac accepted as Carex brizoides L.
- Species Carex engleriana H.Lév. & Vaniot accepted as Carex leucochlora var. leucochlora Bunge
- Species Carex ensifolia (Turcz. ex Gorodkov) V.I.Krecz. accepted as Carex bigelowii subsp. ensifolia (Turcz. ex Gorodkov) Holub
- Species Carex ensifolia Turcz. ex Besser accepted as Carex saxatilis L.
- Species Carex epapillosa Mack. accepted as Carex heteroneura var. epapillosa (Mack.) F.J.Herm.
- Species Carex epigeios (Laest.) Fr. accepted as Carex salina var. salina Wahlenb.
- Species Carex epigejos (Laest.) Fr. accepted as Carex salina var. salina Wahlenb.
- Species Carex equadorica Kük. accepted as Carex ecuadorica Kük.
- Species Carex erecta J.F.Gmel. accepted as Carex cespitosa L.
- Species Carex erecta DC. accepted as Carex sempervirens Vill.
- Species Carex eremitica Paine accepted as Carex stenophylla subsp. stenophylloides (V.I.Krecz.) T.V.Egorova
- Species Carex eriandrolepis H.Lév. accepted as Carex sabynensis var. sabynensis Less. ex Kunth
- Species Carex erinacea Muhl. ex Steud. accepted as Carex hystericina Muhl. ex Willd.
- Species Carex eriophora Fisch. ex Steud.
- Species Carex eriophylla (Kük.) Kom. accepted as Carex raddei Kük.
- Species Carex erostrata Boott ex C.B.Clarke accepted as Carex orbicularis subsp. orbicularis Boott
- Species Carex erxlebeniana Kelso accepted as Carex inops subsp. heliophila (Mack.) Crins
- Species Carex erythraea Schrad. accepted as Carex baccans Nees
- Species Carex erythrolepis Kük. accepted as Carex wahuensis subsp. wahuensis C.A.Mey.
- Species Carex erythrorrhiza Steud. accepted as Carex koestlinii Hochst. ex Steud.
- Species Carex erythrostachys Hoppe accepted as Carex flacca subsp. erythrostachys (Hoppe) Holub
- Species Carex esenbeckii Boott accepted as Carex unciniiformis Boeckeler
- Species Carex essenbeckii Boott accepted as Carex esenbeckii Kunth
- Species Carex estesiana Kelso accepted as Carex nelsonii Mack.
- Species Carex euphlebia S.T.Blake accepted as Carex graeffeana Boeckeler
- Species Carex eurycarpa Holm accepted as Carex angustata Boott
- Species Carex euryphylla Cherm. accepted as Carex haematosaccus C.B.Clarke
- Species Carex eurystachya F.J.Herm. accepted as Carex enanderi Hultén
- Species Carex euxina (Woronow & Marcow.) V.I.Krecz. accepted as Carex depressa subsp. transsilvanica (Schur) K.Richt.
- Species Carex euxina Marc. ex Kneuck. accepted as Carex depressa subsp. transsilvanica (Schur) K.Richt.
- Species Carex evoluta Hartm.
- Species Carex ewingii E.S.Marshall accepted as Carex grahamii Boott
- Species Carex exaltata Kit.
- Species Carex exaltata Peterm. accepted as Carex riparia Curtis
- Species Carex excisa Boott accepted as Carex conica var. conica Boott
- Species Carex excurrens Cham. ex Steud. accepted as Carex podocarpa R.Br.
- Species Carex excurva Boott accepted as Carex nemostachys Steud.
- Species Carex exerta C.H.Chu accepted as Carex glossostigma Hand.-Mazz.
- Species Carex exigua Boeckeler accepted as Carex spicigera Nees
- Species Carex explens Kük. accepted as Carex bostrychostigma Maxim.
- Species Carex exploratorum Nelmes accepted as Carex graeffeana Boeckeler
- Species Carex exsalina Lepage
- Species Carex exserta Mack. accepted as Carex filifolia var. erostrata Kük.
- Species Carex extensa C.A.Mey. accepted as Carex diluta M.Bieb.
- Species Carex eymae Nelmes accepted as Carex perakensis var. borneensis (C.B.Clarke) Noot.
- Species Carex faberiana Loes. accepted as Carex maximowiczii Miq.
- Species Carex fabri Hance accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex falcata Turcz. accepted as Carex vaginata var. petersii (C.A.Mey. ex F.Schmidt) Akiyama
- Species Carex fallax Steud. accepted as Carex nubigena subsp. nubigena D.Don
- Species Carex familiaris Steud. accepted as Carex oxylepis var. oxylepis Torr. & Hook.
- Species Carex fangiana X.F.Jin & Y.Y.Zhou accepted as Carex desponsa Boott
- Species Carex farwellii Mack. accepted as Carex rossii Boott
- Species Carex fascicularis Siev. ex Trevir. accepted as Carex cespitosa L.
- Species Carex fasciculata Willd. accepted as Carex echinata subsp. echinata Murray
- Species Carex fasciculata Link ex Schkuhr accepted as Carex echinata subsp. echinata Murray
- Species Carex fauriae Franch. accepted as Carex phacota Spreng.
- Species Carex fauriei Franch. accepted as Carex insaniae var. insaniae Koidz.
- Species Carex favratii Christ
- Species Carex fedtschenkoana Kük. accepted as Carex songorica Kar. & Kir.
- Species Carex felipensis C.B.Clarke accepted as Carex anisostachys Liebm.
- Species Carex felixii L.C.Lamb.
- Species Carex feminea Steud. ex Boott accepted as Carex acutata Boott
- Species Carex fendleriana Boeckeler accepted as Carex douglasii Boott
- Species Carex ferax J.F.Gmel. accepted as Carex cespitosa L.
- Species Carex ferax Raeusch. accepted as Carex cespitosa L.
- Species Carex ferdinandi-sauteri Asch. & Graebn.
- Species Carex ferruginea Schkuhr accepted as Carex sempervirens Vill.
- Species Carex ferruginea Steven accepted as Carex tristis M.Bieb.
- Species Carex ferruspiculata C.H.Chu accepted as Carex glossostigma Hand.-Mazz.
- Species Carex festiva Dewey accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex festivella Mack. accepted as Carex microptera Mack.
- Species Carex fibrata S.Vidal accepted as Carex cirrhulosa Nees
- Species Carex figertii Asch. & Graebn.
- Species Carex filamentosa K.T.Fu accepted as Carex capilliculmis S.R.Zhang
- Species Carex filicina Boeckeler ex C.B.Clarke accepted as Carex stramentitia Boott ex Boeckeler
- Species Carex filiculmis Franch. & Sav. accepted as Carex mitrata var. aristata Ohwi
- Species Carex filifolia J.Gay accepted as Carex durieui Steud. ex Kunze
- Species Carex filiformis L. accepted as Carex montana L.
- Species Carex filipendula Drejer accepted as Carex lyngbyei Hornem.
- Species Carex filkukae Podp.
- Species Carex firmior (Norman) Holmb.
- Species Carex fischeriana J.Gay accepted as Carex chordorrhiza L.f.
- Species Carex fissilis Boott accepted as Carex indica var. indica L.
- Species Carex flaccida Sw. ex Kunth accepted as Carex polystachya var. polystachya Sw. ex Wahlenb.
- Species Carex flaccidior (F.Schmidt) Miyabe & Kudô accepted as Carex augustinowiczii var. augustinowiczii Meinsh.
- Species Carex flaccidula Steud. accepted as Carex rosea Willd.
- Species Carex flaccifolia Mack. accepted as Carex whitneyi Olney
- Species Carex flacciformis Hoffmanns. ex Kunth accepted as Carex laevigata Sm.
- Species Carex flagellum J.F.Gmel. accepted as Scleria secans (L.) Urb.
- Species Carex flavella V.I.Krecz. accepted as Carex flava L.
- Species Carex flavescens Burch. accepted as Carex burchelliana Boeckeler
- Species Carex flavescens Host accepted as Carex fulva Gooden.
- Species Carex flavicans (F.Nyl.) F.Nyl.
- Species Carex flaviceps Kük. accepted as Carex subfusca W.Boott
- Species Carex flavofulva Beurl. accepted as Carex flava L.
- Species Carex fleckeri Nelmes accepted as Carex horsfieldii Boott
- Species Carex flectens Boott accepted as Carex papulosa Boott
- Species Carex fleischeri Podp. accepted as Carex toezensis Simonk.
- Species Carex flexilis Rudge accepted as Carex castanea Wahlenb.
- Species Carex flexilis D.Don accepted as Carex lenta D.Don
- Species Carex flexuosa Muhl. ex Willd. accepted as Carex debilis var. rudgei L.H.Bailey
- Species Carex floresiana Hochst. ex Seub. accepted as Carex vulcani Hochst. ex Seub.
- Species Carex floribunda Boeckeler accepted as Carex eminens Nees
- Species Carex floribunda (Korsh.) Meinsh. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex foeminea Steud. accepted as Carex acutata Boott
- Species Carex foenea Muhl. ex Torr. accepted as Carex albolutescens Schwein.
- Species Carex foliabunda A.E.Kozhevn. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex foliata F.Schmidt ex Meinsh. accepted as Carex pilosa Scop.
- Species Carex foliosa All. accepted as Carex flava L.
- Species Carex foliosa D.Don accepted as Carex wallichiana Spreng.
- Species Carex foliosa D.Don ex Tilloch & Taylor accepted as Carex wallichiana Spreng.
- Species Carex folliculacea Crantz accepted as Carex folliculata L.
- Species Carex folliculata Wahlenb. accepted as Carex intumescens Rudge
- Species Carex folliculata Elliott accepted as Carex turgescens Torr.
- Species Carex fonkii Phil. accepted as Carex banksii var. fonkii (Phil.) Kük.
- Species Carex fontanesiana DC. accepted as Carex pyrenaica subsp. pyrenaica Wahlenb.
- Species Carex fontanesii Poir. accepted as Carex divisa Huds.
- Species Carex fontis-sancti Podp. accepted as Carex alberti H.Lév.
- Species Carex forbesii C.B.Clarke accepted as Carex pumila Thunb.
- Species Carex forficula Sennen accepted as Carex distans subsp. distans L.
- Species Carex fragosoana Pau
- Species Carex franchetiana H.Lév. & Vaniot accepted as Carex sendaica Franch.
- Species Carex frankii Podp. accepted as Carex strictiformis Almq.
- Species Carex franklinii Boott accepted as Carex petricosa var. petricosa Dewey
- Species Carex fraseri Andrews accepted as Carex fraseriana Ker Gawl.
- Species Carex fraterna Rupr. accepted as Carex spicata subsp. spicata Huds.
- Species Carex fraudulans Printz accepted as Carex tenuiformis var. tenuiformis H.Lév. & Vaniot
- Species Carex fridrichsthaliana Steud. accepted as Carex cespitosa L.
- Species Carex fridtzii Holmb.
- Species Carex friesii Blytt
- Species Carex frigida Vill. accepted as Carex ferruginea Scop.
- Species Carex frigida Wahlenb. accepted as Carex fuliginosa Schkuhr
- Species Carex frisica H.Koch accepted as Carex trinervis Degl.
- Species Carex fuegiana Gand.
- Species Carex fuegina Phil. accepted as Carex atropicta Steud.
- Species Carex fuirenoides Gaudich. accepted as Carex indica var. indica L.
- Species Carex fujidae Kudô accepted as Carex fujitae Kudô
- Species Carex fujimakii M.Kikuchi accepted as Carex kujuzana Ohwi
- Species Carex fujitae Kudô accepted as Carex livida (Wahlenb.) Willd.
- Species Carex fuliginosa Host accepted as Carex fimbriata Schkuhr
- Species Carex fulleri H.E.Ahles accepted as Carex songorica Kar. & Kir.
- Species Carex fulva Gooden.
- Species Carex fulva Hornem. accepted as Carex binervis Sm.
- Species Carex fulva Thuill. accepted as Carex diandra Schrank
- Species Carex fulva G.Gaertn., B.Mey. & Scherb. accepted as Carex distans subsp. distans L.
- Species Carex fulva Muhl. accepted as Carex elliottii Schwein. & Torr.
- Species Carex fulva Host accepted as Carex hostiana DC.
- Species Carex fulvescens Mack. accepted as Carex hostiana DC.
- Species Carex fulvicoma Dewey accepted as Carex chordorrhiza L.f.
- Species Carex fumida Beilschm. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex fumosa (Gren.) Prain accepted as Carex spicata subsp. spicata Huds.
- Species Carex fumosa Rouy accepted as Carex spicata Huds.
- Species Carex funhuangshanica F.T.Wang & Tang ex P.C.Li
- Species Carex funicularis Franch. accepted as Carex meyeriana Kunth
- Species Carex funiformis Clairv. accepted as Carex chordorrhiza L.f.
- Species Carex funingensis Tang & F.T.Wang ex S.Y.Liang accepted as Carex brevicuspis C.B.Clarke
- Species Carex furcata Elliott accepted as Carex comosa Boott
- Species Carex furcata Lapeyr. accepted as Carex vesicaria L.
- Species Carex furculata Peterm. accepted as Carex spicata subsp. spicata Huds.
- Species Carex furusei T.Koyama
- Species Carex furva (L.H.Bailey) Piper accepted as Carex praticola Rydb.
- Species Carex fusanensis Ohwi accepted as Carex gifuensis Franch.
- Species Carex fusca All. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex fusca Sol. ex Boott accepted as Carex pumila Thunb.
- Species Carex fusca Schkuhr accepted as Carex saxatilis L.
- Species Carex fuscata Ohwi accepted as Carex lasiocarpa var. occultans (Franch.) Kük.
- Species Carex fuscescens Willd. ex Kunth accepted as Carex divisa Huds.
- Species Carex fuscescens Boeckeler accepted as Carex kiotensis Franch. & Sav.
- Species Carex fuscidula V.I.Krecz. ex T.V.Egorova accepted as Carex capillaris subsp. fuscidula (V.I.Krecz. ex T.V.Egorova) Ã.Löve & D.Löve
- Species Carex fuscifructus C.B.Clarke accepted as Carex atherodes Spreng.
- Species Carex fuscoatia Boeckeler accepted as Carex pichinchensis Kunth
- Species Carex fuscoatra Boecheler accepted as Carex pichinchensis Kunth
- Species Carex fuscocuprea (Kük.) V.I.Krecz. accepted as Carex limosa L.
- Species Carex fuscofibrosa Ohwi accepted as Carex longirostrata var. tenuistachya (Nakai) Yonek.
- Species Carex fuscotincta Mack. accepted as Carex aztecica Mack.
- Species Carex fuscotincta Merino accepted as Carex caryophyllea Latourr.
- Species Carex fuscovaginata Kük. accepted as Carex acuta L.
- Species Carex fusiformis Chapm. ex Boott accepted as Carex laxiflora var. laxiflora Lam.
- Species Carex fussii Simonk.
- Species Carex fyllae Holm accepted as Carex dacica Heuff.
- Species Carex gagaensis Akiyama accepted as Carex parciflora Boott
- Species Carex gaimardioides É.Desv. accepted as Zameioscirpus gaimardioides (É.Desv.) Dhooge & Goetgh.
- Species Carex gajonum Nelmes accepted as Carex echinata subsp. echinata Murray
- Species Carex galactolepis Nelmes accepted as Carex cruciata Wahlenb.
- Species Carex galbana L.H.Bailey accepted as Carex boliviensis subsp. boliviensis Van Heurck & Müll.Arg.
- Species Carex galeottiana C.A.Mey.
- Species Carex gallaecica H.Lév. & Vaniot accepted as Carex asturica Boiss.
- Species Carex gandogeri H.Lév. ex Gand. accepted as Carex binervis Sm.
- Species Carex gandogeri H.Lév. & Vaniot accepted as Carex binervis Sm.
- Species Carex gansuensis Franch. accepted as Carex flavocuspis Franch. & Sav.
- Species Carex gardneri Lepage accepted as Carex paleacea Schreb. ex Wahlenb.
- Species Carex gasparrinii Parl. accepted as Carex echinata subsp. echinata Murray
- Species Carex gaudiniana Guthnick
- Species Carex gauthieri Lepage accepted as Carex paleacea Schreb. ex Wahlenb.
- Species Carex gayana Steud. accepted as Carex asturica Boiss.
- Species Carex geantha Ohwi accepted as Carex jacens C.B.Clarke
- Species Carex gebhardii Hoppe accepted as Carex brunnescens subsp. brunnescens (Pers.) Poir.
- Species Carex gebhardii Willd. accepted as Carex elongata L.
- Species Carex gebleri Prescott ex Boott accepted as Carex songorica Kar. & Kir.
- Species Carex geihokuensis K.Okamoto accepted as Carex leucochlora var. candolleana (H.Lév. & Vaniot) Katsuy.
- Species Carex gembolensis C.B.Clarke accepted as Carex vesiculosa Boott
- Species Carex geniculata Host accepted as Carex frigida All.
- Species Carex gentiliana H.Lév. accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex genuensis DC. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex georgiana Dewey ex Steud. accepted as Carex hystericina Muhl. ex Willd.
- Species Carex georgiana Dewey accepted as Carex hystericina Muhl. ex Willd.
- Species Carex gerhardtii Figert
- Species Carex germana Boott accepted as Carex banksii var. banksii Boott
- Species Carex germanica K.Richt. ex Asch. & Graebn. accepted as Carex beckmannii Keck
- Species Carex germanica K.Richt. accepted as Carex beckmannii Keck
- Species Carex gersneri Suter accepted as Carex humilis var. humilis Leyss.
- Species Carex ghristii Boeckeler accepted as Carex christii Boeckeler
- Species Carex gibbsii Petrie accepted as Carex dallii Kirk
- Species Carex gibsonii Bab. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex gigas (Holm) Mack. accepted as Carex scabriuscula Mack.
- Species Carex gilesii Nelmes accepted as Carex nivalis Boott
- Species Carex gilliesii Phil. accepted as Carex banksii var. banksii Boott
- Species Carex gilva Casseb. & Theob. accepted as Carex brizoides L.
- Species Carex ginsiensis Waisb.
- Species Carex giraudiana Steud. accepted as Carex boryana Schkuhr
- Species Carex glabella Pabreža ex C.Regel accepted as Carex cespitosa L.
- Species Carex glaberrima Meinsh. accepted as Carex atherodes Spreng.
- Species Carex glaberrima (Ohwi) Katsuy. accepted as Carex dolichostachya var. glaberrima (Ohwi) T.Koyama
- Species Carex glabra Boott accepted as Carex venusta Dewey
- Species Carex glabrior (Ohwi) Akiyama accepted as Carex odontostoma Kük.
- Species Carex glandulifolia Kük. accepted as Carex lancifolia C.B.Clarke
- Species Carex glandulosa Elliott ex Boott accepted as Carex glaucescens Elliott
- Species Carex glauca Scop. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex glauca Bosc ex Boott accepted as Carex glaucescens Elliott
- Species Carex glaucina Boeckeler accepted as Carex filicina Nees
- Species Carex glaucocarpa St.-Lag. accepted as Carex limosa L.
- Species Carex glazioviana Boeckeler accepted as Carex hilairei Boott
- Species Carex glehnii F.Schmidt accepted as Carex parciflora Boott
- Species Carex globuliformis Melnikov accepted as Carex filifolia var. filifolia Nutt.
- Species Carex glomerabilis V.I.Krecz. accepted as Carex glomerata Thunb.
- Species Carex glomerata Host accepted as Carex stenophylla subsp. stenophylla Wahlenb.
- Species Carex glomerata Gilib. ex Bubani accepted as Carex vulpina L.
- Species Carex godefrinii Willemet accepted as Carex strigosa Huds.
- Species Carex gogelana Podp. accepted as Carex demissa subsp. demissa Hornem.
- Species Carex gokwanensis Hayata accepted as Carex chrysolepis Franch. & Sav.
- Species Carex gonochorica Cherm. accepted as Carex pyramidalis Kük.
- Species Carex goodenoughii Asch. & Graebn. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex goodenowii J.Gay accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex gorodkovii V.I.Krecz. accepted as Carex stenantha var. taisetsuensis Akiyama
- Species Carex gotlandica Englund accepted as Carex tornabenei Chiov.
- Species Carex gracilenta Litv. accepted as Carex anisoneura V.I.Krecz.
- Species Carex gracilescens Steud.
- Species Carex gracilescens (Hartm. ex Andersson) Trautv. accepted as Carex riparia Curtis
- Species Carex graciliculmis Ohwi accepted as Carex kirganica Kom.
- Species Carex graciliformis V.I.Krecz. accepted as Carex acuta L.
- Species Carex gracilipes Miq. accepted as Carex phacota Spreng.
- Species Carex gracilirostris C.B.Clarke ex Franch. accepted as Carex rubrobrunnea var. rubrobrunnea C.B.Clarke
- Species Carex gracilis Curtis accepted as Carex acuta L.
- Species Carex gracilis Ehrh. ex Schkuhr accepted as Carex brunnescens subsp. brunnescens (Pers.) Poir.
- Species Carex gracilis A.Gray accepted as Carex disperma Dewey
- Species Carex gracilis Wimm. accepted as Carex elata subsp. elata All.
- Species Carex gracilis R.Br. accepted as Carex lenta D.Don
- Species Carex gracilis Honck. accepted as Carex mucronata All.
- Species Carex gracilis Ehrh. accepted as Carex brunnescens (Pers.) Poir.
- Species Carex gracilis Moench accepted as Carex montana L.
- Species Carex gracilispica Hayata accepted as Carex truncatigluma C.B.Clarke
- Species Carex gracillima Steud. & Hochst. accepted as Carex ferruginea Scop.
- Species Carex grandilimosa Akiyama accepted as Carex middendorffii var. middendorffii F.Schmidt
- Species Carex grandis L.H.Bailey accepted as Carex gigantea Rudge
- Species Carex grandisquama Franch. accepted as Carex papulosa Boott
- Species Carex granifera Dunn accepted as Carex blinii H.Lév. & Vaniot
- Species Carex granitica Braun-Blanq. accepted as Carex sempervirens Vill.
- Species Carex grantii A.Benn.
- Species Carex granularioides Schwein. accepted as Carex conoidea Willd.
- Species Carex grasmanniana Rabenh. accepted as Carex grassmanniana Rabenh.
- Species Carex grasmanniana (O.Lang) Rabenh. ex Steud. accepted as Carex tomentosa L.
- Species Carex grassmanniana Rabenh. accepted as Carex tomentosa L.
- Species Carex grayana Dewey accepted as Carex livida (Wahlenb.) Willd.
- Species Carex greeniana Dewey accepted as Carex hostiana DC.
- Species Carex greenii Boeckeler accepted as Carex bullata Willd.
- Species Carex griersonii Noltie accepted as Carex rufulistolon T.Koyama
- Species Carex griffithii Boott accepted as Carex nivalis Boott
- Species Carex grisea Viv. accepted as Carex grioletii Roem. ex Schkuhr
- Species Carex groenlandica Lange
- Species Carex grosseckii Heuff. ex Boott accepted as Carex pyrenaica subsp. pyrenaica Wahlenb.
- Species Carex grossheimii V.I.Krecz. accepted as Carex disticha Huds.
- Species Carex grossii Fiek
- Species Carex grypos Schkuhr accepted as Carex echinata subsp. echinata Murray
- Species Carex guestphalica (Rchb.) Boenn. ex O.Lang accepted as Carex divulsa Stokes
- Species Carex guestphalica Boenn. ex W.D.J.Koch accepted as Carex divulsa Stokes
- Species Carex guestphalica (Rchb.) Boenn. ex W.D.J.Koch accepted as Carex divulsa Stokes
- Species Carex guffroyana H.Lév. & Vaniot accepted as Carex kiotensis Franch. & Sav.
- Species Carex guniuensis S.W.Su accepted as Carex longirostrata subsp. longirostrata C.A.Mey.
- Species Carex guthnickiana J.Gay accepted as Carex peregrina Link
- Species Carex gymnoclada Holm accepted as Carex scopulorum var. bracteosa (L.H.Bailey) F.J.Herm.
- Species Carex gynaecandra H.Pfeiff. accepted as Carex brasiliensis A.St.-Hil.
- Species Carex gynandra Sieber ex Kunth accepted as Carex distachya var. distachya Desf.
- Species Carex gynobasis Chaix accepted as Carex halleriana Asso
- Species Carex gynobasis Vill. accepted as Carex halleriana Asso
- Species Carex gynocrates auct. accepted as Carex alascana Boeckeler
- Species Carex gynocrates Wormsk. ex Drejer accepted as Carex nardina (Hornem.) Fr.
- Species Carex gynomane Bertol. accepted as Carex distachya var. distachya Desf.
- Species Carex haastiana Boeckeler accepted as Carex raoulii Boott
- Species Carex haematolepis Drejer
- Species Carex haematorrhyncha Ohwi & T.Koyama accepted as Carex retrofracta subsp. retrofracta Kük.
- Species Carex haematostachys H.Lév. & Vaniot accepted as Carex heterostachya Bunge
- Species Carex haenkeana J.Presl & C.Presl accepted as Carex pseudocyperus var. haenkeana (C.Presl) Kük.
- Species Carex hageri E.Baumann
- Species Carex hagiana Kelso accepted as Carex heteroneura var. epapillosa (Mack.) F.J.Herm.
- Species Carex hailstonei S.Gibson accepted as Carex remota subsp. remota L.
- Species Carex hainanensis Merr. ex Chun & F.C.How accepted as Carex commixta Steud.
- Species Carex hakkuensis Hayata accepted as Carex cruciata Wahlenb.
- Species Carex hakodatensis H.Lév. & Vaniot accepted as Carex auriculata Franch.
- Species Carex haleana Olney accepted as Carex granularis Muhl. ex Willd.
- Species Carex halei L.H.Bailey ex C.B.Clarke accepted as Carex halei J.Carey
- Species Carex halei Dewey accepted as Carex crus-corvi Shuttlew. ex Kunze
- Species Carex halei J.Carey accepted as Carex louisianica L.H.Bailey
- Species Carex hallaisanensis H.Lév. & Vaniot accepted as Carex erythrobasis H.Lév. & Vaniot
- Species Carex halleri Vest accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex halleri Gunnerus accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex hallii L.H.Bailey accepted as Carex nudata W.Boott
- Species Carex halmaturina Boeckeler accepted as Carex tereticaulis F.Muell.
- Species Carex halophila F.Nyl.
- Species Carex halophila Heuff. accepted as Carex hostiana DC.
- Species Carex halseyana Dewey accepted as Carex polymorpha Muhl.
- Species Carex halseyi Eaton accepted as Carex polymorpha Muhl.
- Species Carex hamata J.R.Forst. ex Steud. accepted as Carex forsteri Wahlenb.
- Species Carex hamosa Thouars accepted as Carex uncinata L.f.
- Species Carex hanasakensis T.Koyama
- Species Carex hancei C.B.Clarke accepted as Carex sampsonii Hance
- Species Carex hangtongensis H.Lév. & Vaniot accepted as Carex rhynchophora Franch.
- Species Carex hangzhouensis C.Z.Zheng, X.F.Jin & B.Y.Ding accepted as Carex rivulorum Dunn
- Species Carex hankaensis Kitag. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex hanseniana Junge
- Species Carex harmsiana Kük. ex H.Lév. accepted as Carex meiocarpa H.Lév. & Vaniot
- Species Carex harperi Fernald accepted as Carex leptalea subsp. harperi (Fernald) W.Stone
- Species Carex hartii Dewey
- Species Carex hartmanii A.Cajander accepted as Carex hartmaniorum A.Cajander
- Species Carex hartwegii Boott accepted as Carex polystachya var. polystachya Sw. ex Wahlenb.
- Species Carex hartzii Gand. accepted as Carex bigelowii subsp. bigelowii Torr. ex Schwein.
- Species Carex hassiana Loes. accepted as Carex forficula Franch. & Sav.
- Species Carex hastata Kük. accepted as Carex canina subsp. canina Dunn
- Species Carex hatusimana Ohwi accepted as Carex rhynchachaenium C.B.Clarke
- Species Carex hausmannii Tapp. ex Kalela
- Species Carex haussknechtii Senay accepted as Carex senayana Soó
- Species Carex havilandii C.B.Clarke accepted as Carex verticillata Zoll. & Moritzi
- Species Carex hawaiiensis H.St.John accepted as Carex echinata subsp. echinata Murray
- Species Carex hayatae H.Lév. accepted as Carex blepharicarpa Franch.
- Species Carex hayatana Honda accepted as Carex subtransversa C.B.Clarke
- Species Carex haysii S.L.Welsh accepted as Carex curatorum Stacey
- Species Carex hebecarpa Hook. & Arn. accepted as Carex hookeri Kunth
- Species Carex heilongjiangensis Y.L.Chou accepted as Carex reptabunda (Trautv.) V.I.Krecz.
- Species Carex helenae Jac.Koopman, Beusekom & Waltje
- Species Carex heleochariformis H.Lév. & Vaniot accepted as Carex onoei Franch. & Sav.
- Species Carex heleonastes Lilj. accepted as Carex glareosa subsp. glareosa Schkuhr ex Wahlenb.
- Species Carex heliophila Mack. accepted as Carex inops subsp. heliophila (Mack.) Crins
- Species Carex helvetica Honck. accepted as Carex frigida All.
- Species Carex helvetica Schleich. ex Kunth accepted as Carex punctata Gaudin
- Species Carex helvola Blytt
- Species Carex helvola Wimm. accepted as Carex elanescens Cif. & Giacom.
- Species Carex henningsiana Boeckeler accepted as Carex vulpinaris Nees
- Species Carex hepburnii Boott accepted as Carex nardina var. hepburnii (Boott) Kük.
- Species Carex heptastachys Boeckeler accepted as Carex bonplandii Kunth
- Species Carex herbariorum L.H.Bailey accepted as Carex luzulina var. ablata (L.H.Bailey) F.J.Herm.
- Species Carex heribaudiana H.Lév. & Vaniot accepted as Carex caryophyllea Latourr.
- Species Carex hermaphrodita J.F.Gmel. accepted as Carex myosuroides Vill.
- Species Carex hermaphrodita Jacq. accepted as Cyperus hermaphroditus (Jacq.) Standl.
- Species Carex hermaphroditica J.F.Gmel. accepted as Carex myosuroides Vill.
- Species Carex heteroclita Franch. accepted as Carex grallatoria var. heteroclita (Franch.) Kük. ex Matsum.
- Species Carex heterolepis Boeckeler accepted as Carex cruenta Nees
- Species Carex heterophylla Krock. accepted as Carex praecox Schreb.
- Species Carex heterophylla Krock. ex Steud. accepted as Carex praecox Schreb.
- Species Carex heterophyta Holmb.
- Species Carex heterosperma Wahlenb. accepted as Carex striatula Michx.
- Species Carex heterostachya Torr. accepted as Carex careyana Torr. ex Dewey
- Species Carex hexinensis S.Yun Liang & Y.Z.Huang accepted as Carex hoozanensis Hayata
- Species Carex hibernica A.Benn.
- Species Carex hidewoi Ohwi accepted as Carex lehmannii Drejer
- Species Carex hieronymi Boeckeler accepted as Carex fuscula d'Urv.
- Species Carex hilaireioides C.B.Clarke accepted as Carex hilaireioides C.B.Clarke ex Kük.
- Species Carex hilgendorfiana Boeckeler accepted as Carex duvaliana Franch. & Sav.
- Species Carex hindsii C.B.Clarke accepted as Carex kelloggii var. limnophila (Holm) B.L.Wilson & R.E.Brainerd
- Species Carex hirsuta Willd. accepted as Carex hirsutella Mack.
- Species Carex hirsuta Suter accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex hirtella Drejer accepted as Carex plectobasis V.I.Krecz.
- Species Carex hirtella (Sw.) J.F.Gmel. accepted as Scleria hirtella Sw.
- Species Carex hirtiformis Dalla Torre & Sarnth.
- Species Carex hirtiformis Pers. accepted as Carex hirta L.
- Species Carex hirtiglumis C.B.Clarke ex Kük. accepted as Carex hirtigluma C.B.Clarke
- Species Carex hispida Willd. accepted as Carex hispida Willd. ex Schkuhr
- Species Carex hispida Gaudin accepted as Carex fimbriata Schkuhr
- Species Carex hispidangula T.Koyama accepted as Carex tricephala Boeckeler
- Species Carex hispidula Gaudin accepted as Carex fimbriata Schkuhr
- Species Carex hitchcockii Eaton accepted as Carex hitchcockiana Dewey
- Species Carex hoatiensis H.Lév. accepted as Carex leucochlora var. candolleana (H.Lév. & Vaniot) Katsuy.
- Species Carex hobkodensis Franch. accepted as Carex hakkodensis Franch.
- Species Carex hochstetteri Frank ex Steud. accepted as Carex leptalea subsp. leptalea Wahlenb.
- Species Carex hohenackeriana C.A.Mey. ex V.I.Krecz. accepted as Carex grioletii Roem. ex Schkuhr
- Species Carex holmiana Mack. accepted as Carex buxbaumii Wahlenb.
- Species Carex hololasius H.Lév. & Vaniot accepted as Carex duvaliana Franch. & Sav.
- Species Carex homalocarpa Peterm. accepted as Carex elata subsp. elata All.
- Species Carex homoiolepis Franch. & Sav. accepted as Carex nervata Franch. & Sav.
- Species Carex hondae Akiyama accepted as Carex senanensis Ohwi
- Species Carex hongkongensis Franch. accepted as Carex ligata Boott
- Species Carex hoppneri Boott accepted as Carex subspathacea Wormsk. ex Hornem.
- Species Carex hordeiformis Wahlenb. accepted as Carex hordeistichos Vill.
- Species Carex horikawae K.Okamoto accepted as Carex leucochlora var. horikawae (K.Okamoto) Katsuy.
- Species Carex hornschuchiana Hoppe accepted as Carex hostiana DC.
- Species Carex hosoii T.Koyama
- Species Carex hostii Hoppe & Hornsch. ex Kunth accepted as Carex divisa Huds.
- Species Carex hostii Schkuhr accepted as Carex stenophylla subsp. stenophylla Wahlenb.
- Species Carex hotaizanensis Akiyama accepted as Carex siroumensis Koidz.
- Species Carex houghtonii Torr. accepted as Carex houghtoniana Torr. ex Dewey
- Species Carex howei Mack. accepted as Carex atlantica subsp. capillacea (L.H.Bailey) Reznicek
- Species Carex howellii L.H.Bailey accepted as Carex aquatilis var. dives (Holm) Kük.
- Species Carex hudsonii A.Benn. accepted as Carex elata subsp. elata All.
- Species Carex huetiana Boiss. accepted as Carex umbrosa subsp. huetiana (Boiss.) Soó
- Species Carex huitensis Steud. accepted as Carex fuscula d'Urv.
- Species Carex humbertii F.T.Wang & Tang accepted as Carex commixta Steud.
- Species Carex humilis Willd. ex Kunth accepted as Carex cespitosa L.
- Species Carex huolushanensis P.C.Li accepted as Carex cardiolepis Nees
- Species Carex huttoniana Kük. accepted as Carex steudneri Boeckeler
- Species Carex hybrida Lam. accepted as Carex divisa Huds.
- Species Carex hybrida Schkuhr ex Kunth accepted as Carex simpliciuscula subsp. simpliciuscula Wahlenb.
- Species Carex hydrophila Dumort. accepted as Carex echinata subsp. echinata Murray
- Species Carex hylaca R.Knapp accepted as Carex canescens subsp. hylaea (V.I.Krecz.) R.Knapp
- Species Carex hylaea V.I.Krecz. accepted as Carex canescens subsp. canescens L.
- Species Carex hymelayensis Steud. accepted as Carex divisa Huds.
- Species Carex hymenina Nees ex Boott accepted as Carex indecora Boott
- Species Carex hymenocarpa Drejer accepted as Carex rostrata var. rostrata Stokes
- Species Carex hyperborea Drejer accepted as Carex dacica Heuff.
- Species Carex hypoblephara Ohwi & Ryu accepted as Carex glossostigma Hand.-Mazz.
- Species Carex hypoleucus Kük. accepted as Carex macrorrhiza Boeckeler
- Species Carex hypolytrifolia T.Koyama accepted as Carex commixta Steud.
- Species Carex hypolytroides R.Gross & Mattf. accepted as Carex hypolytroides Ridl.
- Species Carex hypolytropsis Gross accepted as Carex hypolytroides Ridl.
- Species Carex hypotracheia Nelmes accepted as Carex meeboldiana Kük.
- Species Carex hypoxanthos Steud. accepted as Carex brongniartii Kunth
- Species Carex hypsophila Miq. accepted as Carex verticillata Zoll. & Moritzi
- Species Carex hystrix A.Gray ex Boott accepted as Carex crus-corvi Shuttlew. ex Kunze
- Species Carex ichangensis C.B.Clarke accepted as Carex ascotreta C.B.Clarke ex Franch.
- Species Carex ichimurae Nakai accepted as Carex tenuiformis var. tenuiformis H.Lév. & Vaniot
- Species Carex ikonnikovii T.V.Egorova accepted as Carex borii Nelmes
- Species Carex illinoensis Dewey accepted as Carex conoidea Willd.
- Species Carex illustranda Steud. accepted as Carex bracteosa (Kunze ex Rchb.) Kunth
- Species Carex ilseana Ruhmer
- Species Carex imandrensis Kihlm. ex Hjelt
- Species Carex imbricata Kük. accepted as Carex alta Boott
- Species Carex imbricata Drobow accepted as Carex arcatica Meinsh.
- Species Carex immanis C.B.Clarke accepted as Carex fargesii Franch.
- Species Carex impressa (S.H.Wright) Mack. accepted as Carex hyalinolepis Steud.
- Species Carex impunctata Boott accepted as Carex oligostachya Nees
- Species Carex impura Ohwi accepted as Carex aphyllopus var. impura (Ohwi) T.Koyama
- Species Carex inaequabilis V.I.Krecz. accepted as Carex anomoea Hand.-Mazz.
- Species Carex inaequalis Boott ex C.B.Clarke accepted as Carex anomoea Hand.-Mazz.
- Species Carex inaequalis J.F.Gmel. accepted as Carex cespitosa L.
- Species Carex inamii Ohwi accepted as Carex tenuiformis var. tenuiformis H.Lév. & Vaniot
- Species Carex incerta Steud. accepted as Carex saxatilis L.
- Species Carex incisodentata Steud. accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex incisodentata Lechl. ex Boott accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex inclusa Turcz. ex Boott accepted as Carex alba Scop.
- Species Carex incomperta E.P.Bicknell accepted as Carex atlantica subsp. atlantica L.H.Bailey
- Species Carex incompta Franch. accepted as Carex darwinii var. darwinii Boott
- Species Carex incondita F.J.Herm. accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex inconspicua Colenso accepted as Carex acicularis Boott
- Species Carex inconspicua Steud. accepted as Carex fuscula d'Urv.
- Species Carex incrassata Schltdl. accepted as Carex chilensis Brongn.
- Species Carex incrassata Sol. ex Boott accepted as Carex trifida Cav.
- Species Carex incurva Sm. accepted as Carex divisa Huds.
- Species Carex incurva Lightf. accepted as Carex maritima Gunnerus
- Species Carex indecora Boott accepted as Carex fuscula d'Urv.
- Species Carex indecora Kunth accepted as Carex fuscula d'Urv.
- Species Carex indica F.Muell. ex Benth. accepted as Carex indica var. indica L.
- Species Carex indica Schkuhr accepted as Carex spartea Wahlenb.
- Species Carex indica Wahlenb. accepted as Carex wahlenbergiana Boott
- Species Carex indica J.Koenig ex Willd. accepted as Scleria tessellata var. tessellata Willd.
- Species Carex infirma C.B.Clarke accepted as Carex augustinowiczii var. augustinowiczii Meinsh.
- Species Carex inflata Huds. accepted as Carex rostrata var. rostrata Stokes
- Species Carex inflata Suter accepted as Carex rostrata var. rostrata Stokes
- Species Carex infossa Z.P.Wang accepted as Carex oxyphylla Franch.
- Species Carex inops Kunze accepted as Carex disperma Dewey
- Species Carex inornata Turcz. accepted as Carex melanocarpa Cham. ex Trautv.
- Species Carex inornata Turcz. ex Ledeb. accepted as Carex melanocarpa Cham. ex Trautv.
- Species Carex insulana (Rouy) Prain accepted as Carex caryophyllea Latourr.
- Species Carex insulana Rouy accepted as Carex caryophyllea Latourr.
- Species Carex intacta Samp. accepted as Carex helodes Link
- Species Carex interimus Maguire accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex intermedia Suter accepted as Carex acutiformis Ehrh.
- Species Carex intermedia d'Urv. accepted as Carex arenaria L.
- Species Carex intermedia Gooden. accepted as Carex disticha Huds.
- Species Carex intermedia Retz. accepted as Carex muricata subsp. muricata L.
- Species Carex intermedia Miégev. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex intricata Tineo ex Guss. accepted as Carex nigra subsp. intricata (Tineo ex Guss.) Rivas Mart.
- Species Carex inumbrata V.I.Krecz. accepted as Carex cespitosa L.
- Species Carex inundata Willd. ex Kunth accepted as Carex glaucescens Elliott
- Species Carex invisa L.H.Bailey accepted as Carex spectabilis Dewey
- Species Carex involucrata Boeckeler accepted as Carex aureolensis Steud.
- Species Carex involucrata Boott accepted as Carex fossa G.A.Wheeler
- Species Carex involucratella Mack. accepted as Carex muehlenbergii var. xalapensis (Kunth) Britton
- Species Carex involuta (Bab.) Syme
- Species Carex iranica Melnikov accepted as Carex alatauensis S.R.Zhang
- Species Carex iridifolia Kunth accepted as Carex aethiopica Schkuhr
- Species Carex irrasa L.H.Bailey accepted as Carex douglasii Boott
- Species Carex irregularis Schwein. accepted as Carex oederi var. oederi Retz.
- Species Carex irrigua (Wahlenb.) Sm. ex Hoppe accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex ischnantha Steud. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex ischne C.B.Clarke accepted as Carex fernaldiana H.Lév. & Vaniot
- Species Carex iseana Akiyama accepted as Carex pudica Honda
- Species Carex ishimaensis J.Oda, S.Kinosh. & Nagam.
- Species Carex isomadensis Simonk. ex K.Richt. accepted as Carex ×csomadensis Simonk.
- Species Carex jacca J.Carey ex Boott accepted as Carex barrattii Torr. ex Schwein.
- Species Carex jacintoensis Parish accepted as Carex jamesii Schwein.
- Species Carex jacobi-peteri Hultén accepted as Carex micropoda C.A.Mey.
- Species Carex jaegeri F.W.Schultz
- Species Carex jamaicensis Poir. accepted as Carex hamata Sw.
- Species Carex jamesii Torr. accepted as Carex nebraskensis Dewey
- Species Carex jankae Gand. accepted as Carex brevicollis DC.
- Species Carex japonalpina (T.Koyama) T.Koyama accepted as Carex atrata subsp. atrata L.
- Species Carex japoniciformis Nakai accepted as Carex japonica Thunb.
- Species Carex javanica Boeckeler accepted as Carex baccans Nees
- Species Carex jemtlandica (Palmgr.) Palmgr. accepted as Carex lepidocarpa subsp. jemtlandica Palmgr.
- Species Carex jepsonii J.T.Howell accepted as Carex whitneyi Olney
- Species Carex jimcalderi B.Boivin accepted as Carex leptalea subsp. pacifica Calder & Roy L.Taylor
- Species Carex jisaburo-ohwiana T.Koyama accepted as Carex caucasica subsp. jisaburo-ohwiana (T.Koyama) T.Koyama
- Species Carex jiuxianshanensis L.K.Dai & Y.Z.Huang accepted as Carex fokienensis Dunn
- Species Carex jizogatakensis H.Lév. & Vaniot accepted as Carex kiotensis Franch. & Sav.
- Species Carex josephi-schmittii Raymond
- Species Carex josselynii (Fernald) Mack. ex Pease accepted as Carex echinata subsp. echinata Murray
- Species Carex joussetii Foucaud accepted as Carex costei Rouy
- Species Carex jovis C.B.Clarke
- Species Carex jucunda V.I.Krecz. accepted as Carex maritima Gunnerus
- Species Carex juncea Willd. accepted as Carex misera Buckley
- Species Carex juncea Scop. accepted as Carex xanthocarpa Degl.
- Species Carex juncella T.M.Fries
- Species Carex juncella (Fr.) Th.Fr. accepted as Carex nigra subsp. juncea (Fr.) Soó
- Species Carex juncifolia All. accepted as Carex maritima Gunnerus
- Species Carex juncifolia J.F.Gmel. accepted as Carex mucronata All.
- Species Carex juncifolia Host accepted as Carex stenophylla subsp. stenophylla Wahlenb.
- Species Carex juncoides J.Presl & C.Presl accepted as Carex melanostachya M.Bieb. ex Willd.
- Species Carex jungenda Steud. accepted as Carex saxatilis L.
- Species Carex justi-schmidtii Junge
- Species Carex kamikawensis Franch. accepted as Carex sabynensis var. sabynensis Less. ex Kunth
- Species Carex kamikochiana Nakai accepted as Carex parciflora Boott
- Species Carex kamtschatica (Gorodkov) V.I.Krecz. accepted as Carex bigelowii subsp. bigelowii Torr. ex Schwein.
- Species Carex kanehirae Ohwi accepted as Carex hattoriana Nakai ex Tuyama
- Species Carex kanitzii Porcius accepted as Carex canescens subsp. canescens L.
- Species Carex karacolica Polozhij accepted as Carex caucasica subsp. caucasica Steven
- Species Carex karafutoana Ohwi accepted as Carex lanceolata var. laxa Ohwi
- Species Carex karelinii Meinsh. accepted as Carex diluta M.Bieb.
- Species Carex karisimbiensis Cherm. accepted as Carex simensis Hochst. ex A.Rich.
- Species Carex kasugayamensis Akiyama accepted as Carex sacrosancta Honda
- Species Carex katahdinensis Fernald accepted as Carex conoidea Willd.
- Species Carex kattaeana Kük.
- Species Carex kattegatensis (Almq.) Fr. ex Nyman accepted as Carex vacillans Drejer
- Species Carex kattegatensis (Almq.) Fr. ex V.I.Krecz. accepted as Carex vacillans Drejer
- Species Carex kawakamii Hayata accepted as Carex subtransversa C.B.Clarke
- Species Carex keiskei Miq. accepted as Carex ligulata Nees
- Species Carex kelungensis Hayata accepted as Carex formosensis H.Lév. & Vaniot
- Species Carex kelvingtoniana Steud. accepted as Carex stricta Lam.
- Species Carex kemiriensis Nelmes accepted as Carex teres Boott
- Species Carex kenaica Lepage
- Species Carex kengiana Z.P.Wang accepted as Carex davidii Franch.
- Species Carex kengii Kük. accepted as Carex paxii Kük.
- Species Carex kenkolensis Litv. accepted as Carex haematostoma Nees
- Species Carex kerneri Kohts accepted as Carex ferruginea Scop.
- Species Carex kerrii Nelmes accepted as Carex teres Boott
- Species Carex ketonensis Akiyama
- Species Carex khoii T.V.Egorova & Aver. accepted as Carex harlandii subsp. khoi (T.V.Egorova & Aver.) X.F.Jin
- Species Carex kilinowii Turcz. accepted as Carex pediformis C.A.Mey.
- Species Carex kimurae Ohwi & T.Koyama accepted as Carex dolichostachya subsp. dolichostachya Hayata
- Species Carex kinabaluensis Stapf accepted as Carex perakensis var. borneensis (C.B.Clarke) Noot.
- Species Carex kinashii H.Lév. & Vaniot accepted as Carex prescottiana Boott
- Species Carex kingiana H.Lév. & Vaniot accepted as Carex mitrata var. mitrata Franch.
- Species Carex kingiana C.B.Clarke accepted as Carex sahnii Ghildyal & U.C.Bhattach.
- Species Carex kinpokusanensis Akiyama accepted as Carex temnolepis Franch.
- Species Carex kinugawaensis Sutô & Suzuki accepted as Carex miyabei var. miyabei Franch.
- Species Carex kirilovii Turcz. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex kiusiuana Ohwi accepted as Carex chrysolepis Franch. & Sav.
- Species Carex kiyozumiensis Akiyama accepted as Carex insaniae var. subdita (Ohwi) Ohwi
- Species Carex kneuckeri P.Fourn.
- Species Carex kneuckeriana Zahn accepted as Carex pseudoaxillaris K.Richt.
- Species Carex kobresia Missbach & E.H.L.Krause accepted as Carex simpliciuscula subsp. simpliciuscula Wahlenb.
- Species Carex kobresiiformis S.W.Su accepted as Carex chinensis var. chinensis Retz.
- Species Carex kochiana DC. accepted as Carex acutiformis Ehrh.
- Species Carex kochiana Schübl. accepted as Carex evoluta Hartm.
- Species Carex kohtsii K.Richt.
- Species Carex koidzumiana Ohwi accepted as Carex appendiculata (Trautv. & C.A.Mey.) Kük.
- Species Carex koidzumii Honda accepted as Carex lasiocarpa var. occultans (Franch.) Kük.
- Species Carex kokrinensis A.E.Porsild accepted as Carex eleusinoides Turcz. ex Kunth
- Species Carex kolymaensis Kük. accepted as Carex nigra subsp. juncea (Fr.) Soó
- Species Carex komaroviana A.I.Baranov & Skvortsov accepted as Carex hancockiana Maxim.
- Species Carex komarovii V.I.Krecz.
- Species Carex komarovii Koidz. accepted as Carex tenuiformis var. tenuiformis H.Lév. & Vaniot
- Species Carex koraginensis Meinsh. accepted as Carex scita var. riishirensis (Franch.) Kük.
- Species Carex koreana Kom. accepted as Carex tenuiformis var. tenuiformis H.Lév. & Vaniot
- Species Carex korsakoviensis H.Lév. accepted as Carex sachalinensis var. sachalinensis F.Schmidt
- Species Carex kotilainii Palmgr. accepted as Carex oederi var. bergrothii (Palmgr.) Hedrén & Lassen
- Species Carex kotoensis Hayata accepted as Carex bilateralis Hayata
- Species Carex kotschyana Boiss. & Hohen.
- Species Carex koyamae (Gómez-Laur.) J.R.Starr accepted as Carex phleoides subsp. koyamae (Gómez-Laur.) Jim.Mejías
- Species Carex krajinae Domin
- Species Carex krameri Franch. & Sav. accepted as Carex hakonensis Franch. & Sav.
- Species Carex krausei Boeckeler accepted as Carex krauseorum Boeckeler
- Species Carex krausei P.Fourn. accepted as Carex turfosa Fr.
- Species Carex krebsiana Boeckeler accepted as Carex rhizopoda Maxim.
- Species Carex krullii Boeckeler accepted as Carex pumila Thunb.
- Species Carex kryloviana Schischk. & Serg. accepted as Carex pamirensis subsp. dichroa Malyschev
- Species Carex ktausipali Meinsh. accepted as Carex stenantha var. taisetsuensis Akiyama
- Species Carex kuehleweinii Gand. accepted as Carex macrochaeta C.A.Mey.
- Species Carex kuekenthaliana Appel & A.Brückn.
- Species Carex kuekenthalii Dörfl. ex Zahn
- Species Carex kuekenthalii K.Schum. ex C.B.Clarke accepted as Carex johnstonii Boeckeler
- Species Carex kukkonenii Ö.Nilsson accepted as Carex aterrima subsp. medwedewii (Leskov) T.V.Egorova
- Species Carex kulingana L.H.Bailey accepted as Carex ischnostachya Steud.
- Species Carex kunioi T.Koyama accepted as Carex kujuzana Ohwi
- Species Carex kuntzeana Boeckeler accepted as Carex myosurus Nees
- Species Carex kunzei Olney ex A.Gray accepted as Carex arcta Boott
- Species Carex kurtziana Kük. accepted as Carex hypoleucos É.Desv.
- Species Carex kwangtoushanica K.T.Fu accepted as Carex tatsiensis (Franch.) Kük.
- Species Carex kwangtungensis F.T.Wang & Tang accepted as Carex adrienii E.G.Camus
- Species Carex kyyhkynenii Hiitonen
- Species Carex lacerans Kük. accepted as Carex gaudichaudiana Kunth
- Species Carex lachnosperma Wall. ex Wight accepted as Carex lenta D.Don
- Species Carex lachnosperma Wall. accepted as Carex hebecarpa C.A.Mey.
- Species Carex laciniata Boott accepted as Carex barbarae Dewey
- Species Carex lackowitziana Aug.R.Paul
- Species Carex lacunarum Holm accepted as Carex barbarae Dewey
- Species Carex laestadii Holmb. accepted as Carex ×arctophila F.Nyl.
- Species Carex laevicaulis Hochst. accepted as Carex laevicaulis Hochst. ex Seub.
- Species Carex laevigata Wahlenb. accepted as Carex aethiopica Schkuhr
- Species Carex laevigata Boiss. accepted as Carex camposii Boiss. & Reut.
- Species Carex laevirostris (Blytt ex Fr.) Andersson accepted as Carex utriculata Boott
- Species Carex laevirostris (Blytt ex Fr.) Fr. accepted as Carex utriculata Boott
- Species Carex laevis Hoppe accepted as Carex dioica L.
- Species Carex laevis Kit. ex Willd. accepted as Carex kitaibeliana Degen ex Bech.
- Species Carex laevis (Retz.) J.F.Gmel. accepted as Scleria levis Retz.
- Species Carex laggeri Wimm.
- Species Carex lagopina Wahlenb. accepted as Carex lachenalii subsp. lachenalii Schkuhr
- Species Carex lagopodioides Willd. accepted as Carex tribuloides var. tribuloides Wahlenb.
- Species Carex lagopus Muhl. accepted as Carex fraseriana Ker Gawl.
- Species Carex lamarckii Wood accepted as Carex liparocarpos subsp. liparocarpos Gaudin
- Species Carex lambertiana H.Lév. accepted as Carex sooi Jakucs
- Species Carex lamprophysa Sam. ex Nordh. accepted as Carex otrubae Podp.
- Species Carex lamprosandra Franch. accepted as Carex tapintzensis Franch.
- Species Carex lanceata Dewey accepted as Carex salina var. salina Wahlenb.
- Species Carex lancibracteata A.E.Kozhevn. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex lancifructus Mack. accepted as Carex specifica L.H.Bailey
- Species Carex lanescens Fellm.
- Species Carex langeana Fernald
- Species Carex langii Steud.
- Species Carex langsdorffii Boott accepted as Carex breviculmis var. breviculmis R.Br.
- Species Carex langyaensis S.W.Su & X.M.Fang accepted as Carex shangchengensis S.Yun Liang
- Species Carex lanosa Gueldenst. ex Trevir.
- Species Carex lanosa Gueldenst.
- Species Carex lanuginosa Michx. accepted as Carex lasiocarpa var. americana Fernald
- Species Carex laricina Mack. ex Bright accepted as Carex echinata subsp. echinata Murray
- Species Carex larminatii H.Lév. accepted as Carex uechtritziana K.Richt.
- Species Carex lasiochlaena Kunth accepted as Carex hispida Willd. ex Schkuhr
- Species Carex latebrosa Mack. accepted as Carex praegracilis W.Boott
- Species Carex lateralis Kük. accepted as Carex oxyphylla Franch.
- Species Carex lateriflora Phil. accepted as Carex trichodes Steud.
- Species Carex latibracteolata Kük. accepted as Carex catamarcensis C.B.Clarke ex Kük.
- Species Carex laticeps C.B.Clarke ex Franch.
- Species Carex laticuspis Franch. accepted as Carex lyngbyei Hornem.
- Species Carex latifolia Moench accepted as Carex plantaginea Lam.
- Species Carex latifolia Sol. ex Boott accepted as Carex pseudocyperus var. pseudocyperus L.
- Species Carex latifolia Boiss. & Balansa accepted as Carex sylvatica subsp. latifrons (V.I.Krecz.) Ö.Nilsson
- Species Carex latifolia (Sw.) J.F.Gmel. accepted as Scleria latifolia Sw.
- Species Carex latifrons V.I.Krecz. accepted as Carex sylvatica subsp. latifrons (V.I.Krecz.) Ö.Nilsson
- Species Carex latinervia H.Lév. & Vaniot accepted as Carex heterolepis Bunge
- Species Carex latisquama (Cuatrec.) Pau accepted as Carex distachya var. distachya Desf.
- Species Carex latitans H.Lév. & Vaniot accepted as Carex maculata Boott
- Species Carex lausii Podp.
- Species Carex laxa Dewey accepted as Carex limosa L.
- Species Carex laxa Sw. ex Kunth accepted as Carex scabrella Wahlenb.
- Species Carex laxiflora Elliott accepted as Carex amphibola Steud.
- Species Carex laxiflora Merino accepted as Carex depressa subsp. depressa Link
- Species Carex laxior (Kük.) Mack. accepted as Carex flava L.
- Species Carex laxisquamata Tang & F.T.Wang accepted as Carex breviscapa C.B.Clarke
- Species Carex laxula (Tineo ex Guss.) Tineo ex Benítez & al. accepted as Carex paui Sennen
- Species Carex lazica (Boiss. & Balansa) Kük. accepted as Carex pontica Albov
- Species Carex lazica (Boiss. & Balansa) Boiss. & Balansa ex B.D.Jacks. accepted as Carex pontica Albov
- Species Carex lazica Boiss. & Balansa accepted as Carex pontica Albov
- Species Carex lazica Boiss. & Balansa ex Albov accepted as Carex pontica Albov
- Species Carex lebrunei H.Lév. accepted as Carex renauldii H.Lév.
- Species Carex lebrunii H.Lév. accepted as Carex wallichiana Spreng.
- Species Carex lechleri Phil. accepted as Carex atropicta Steud.
- Species Carex lechleri Steud. accepted as Carex excelsa Poepp. ex Kunth
- Species Carex ledebourii Boiss. & Buhse accepted as Carex melanostachya M.Bieb. ex Willd.
- Species Carex leersana Rouy accepted as Carex leersii F.W.Schultz
- Species Carex leerseana Rouy accepted as Carex leersii F.W.Schultz
- Species Carex leersiana Rauschert accepted as Carex leersii F.W.Schultz
- Species Carex leersiana (Rouy) Prain accepted as Carex leersii F.W.Schultz
- Species Carex leersiana Rouy accepted as Carex leersii F.W.Schultz
- Species Carex leersii Willd. accepted as Carex echinata subsp. echinata Murray
- Species Carex legendrei H.Lév. & Vaniot accepted as Carex sociata Boott
- Species Carex lehmanniana Boott
- Species Carex leiocarpa C.A.Mey. accepted as Carex anthoxanthea J.Presl & C.Presl
- Species Carex leiocarpa J.Gay accepted as Carex asturica Boiss.
- Species Carex leiogona Franch. accepted as Carex middendorffii var. kirigaminensis (Ohwi) Ohwi
- Species Carex leiophylla Mack. accepted as Carex sabulosa Turcz. ex Kunth
- Species Carex lenaensis Kük. accepted as Carex ledebouriana subsp. ledebouriana C.A.Mey. ex Trevir.
- Species Carex lenticularis Dewey accepted as Carex magellanica subsp. magellanica Lam.
- Species Carex lenticularis D.Don accepted as Carex phacota Spreng.
- Species Carex leonura Wahlenb. accepted as Carex crinita var. crinita Lam.
- Species Carex lepageana Raymond accepted as Carex petricosa var. petricosa Dewey
- Species Carex lepidopristis H.Lév. & Vaniot accepted as Carex phacota Spreng.
- Species Carex leporina Schkuhr ex Trevir. accepted as Carex heleonastes subsp. heleonastes Ehrh. ex L.f.
- Species Carex leporina Michx. accepted as Carex scoparia Schkuhr ex Willd.
- Species Carex leporina Pall. ex Kunth accepted as Carex macloviana var. thermarum (Phil.) Kük.
- Species Carex leptoblasta Holmb.
- Species Carex leptocarpa C.B.Clarke accepted as Carex filicina Nees
- Species Carex leptocarpus C.B.Clarke accepted as Carex filicina Nees
- Species Carex leptocladus C.B.Clarke accepted as Carex chlorosaccus C.B.Clarke
- Species Carex leptophylla Heuff. accepted as Carex echinata subsp. echinata Murray
- Species Carex leptosaccus C.B.Clarke
- Species Carex leptostachya Boiss. accepted as Carex strigosa Huds.
- Species Carex leptostachys Ehrh. ex L.f. accepted as Carex strigosa Huds.
- Species Carex lepus-aestatis T.Koyama accepted as Carex nivalis Boott
- Species Carex lerchenfeldiana Schur accepted as Carex hordeistichos Vill.
- Species Carex leribensis Nelmes accepted as Carex glomerata Thunb.
- Species Carex leucantha Schur accepted as Carex pallescens L.
- Species Carex leucocarpa Phil. accepted as Carex banksii var. banksii Boott
- Species Carex leucocarpa Boeckeler accepted as Carex gibba Wahlenb.
- Species Carex leucodonta Holm accepted as Carex turbinata Liebm.
- Species Carex leucoglochin Ehrh. ex Wahlenb. accepted as Carex obtusata Lilj.
- Species Carex leucoglochin L.f. accepted as Carex pauciflora Lightf.
- Species Carex leucolepis Turcz. ex Steud. accepted as Carex tenuiflora Wahlenb.
- Species Carex leucorhiza Dulac accepted as Carex davalliana Sm.
- Species Carex leucostachys Ridl. accepted as Carex perakensis var. perakensis C.B.Clarke
- Species Carex leutzii Kneuck.
- Species Carex leveillei Husnot accepted as Carex maritima Gunnerus
- Species Carex levicaulis Franch. accepted as Carex middendorffii var. middendorffii F.Schmidt
- Species Carex levicuspis Ohwi accepted as Carex kattaeana Kük.
- Species Carex lhotzkiana (Nees) Steud. accepted as Trilepis lhotzkiana Nees
- Species Carex lianchengensis S.Yun Liang & Y.Z.Huang accepted as Carex canina subsp. canina Dunn
- Species Carex licentii Nelmes accepted as Carex karoi Freyn
- Species Carex liddonii Boott accepted as Carex petasata Dewey
- Species Carex liddonii J.Carey accepted as Carex siccata var. siccata Dewey
- Species Carex liebmannii Walp. accepted as Carex anisostachys Liebm.
- Species Carex ligerica J.Gay accepted as Carex colchica J.Gay
- Species Carex ligerina Boreau accepted as Carex colchica J.Gay
- Species Carex ligniciensis Figert
- Species Carex lilibaea Lojac. accepted as Carex acuta L.
- Species Carex limnaea Holm accepted as Carex kelloggii var. impressa (L.H.Bailey) B.L.Wilson & Otting
- Species Carex limnicola H.Gross
- Species Carex limnocharis Holm accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex limnogena Appel
- Species Carex limnophila F.J.Herm. accepted as Carex microptera Mack.
- Species Carex limosoides J.Cay. accepted as Carex notholimosioides Doweld
- Species Carex limprichtii Kük. accepted as Carex tenebrosa Boott
- Species Carex limula Fr.
- Species Carex linearis Clairv. accepted as Carex brachystachys Schrank
- Species Carex linearis Boott accepted as Carex unciniiformis Boeckeler
- Species Carex linearis Clairv. ex Boott accepted as Carex brachystachys Schrank
- Species Carex lineariterminalis T.Koyama accepted as Carex stenocarpa Turcz. ex V.I.Krecz.
- Species Carex lineola C.A.Mey. ex Fr. accepted as Carex salina var. salina Wahlenb.
- Species Carex lineolata Cham. ex Meinsh. accepted as Carex schmidtii Meinsh.
- Species Carex linkii Willd. accepted as Carex distachya var. distachya Desf.
- Species Carex linnaeana Host accepted as Carex dioica L.
- Species Carex linnaei Degl. accepted as Carex dioica L.
- Species Carex lipsiensis Peterm. accepted as Carex lepidocarpa subsp. lepidocarpa
- Species Carex liqingii Tang & F.T.Wang ex S.Y.Liang accepted as Carex calcicola Tang & F.T.Wang
- Species Carex lithosperma (L.) L. accepted as Scleria flagellum-nigrorum P.J.Bergius
- Species Carex lithosperma G.Forst. accepted as Scleria polycarpa Boeckeler
- Species Carex lithosperma Walter accepted as Scleria reticularis Michx.
- Species Carex lithosperma J.F.Gmel. accepted as Scleria lithosperma (L.) Sw.
- Species Carex littoralis Schwein. accepted as Carex barrattii Torr. ex Schwein.
- Species Carex littoralis Petrie accepted as Carex litorosa L.H.Bailey
- Species Carex littoralis Krock. accepted as Carex stricta Lam.
- Species Carex littorea Labill. accepted as Carex pumila Thunb.
- Species Carex litwinowii Kük. accepted as Carex litvinovii Kük.
- Species Carex lividulla Nakai accepted as Carex livida (Wahlenb.) Willd.
- Species Carex lixtalea Wahlenb. accepted as Carex leptalea Wahlenb.
- Species Carex lobata Bellardi accepted as Carex curvula subsp. curvula All.
- Species Carex lobata Lam. accepted as Carex divisa Huds.
- Species Carex lobata Vill. accepted as Carex foetida All.
- Species Carex loefgrenii Boeckeler accepted as Carex polysticha Boeckeler
- Species Carex loheri C.B.Clarke accepted as Carex oxyphylla Franch.
- Species Carex loliacea Schkuhr accepted as Carex pairae F.W.Schultz
- Species Carex loncholepis Less. ex Meinsh. accepted as Carex sylvatica subsp. sylvatica Huds.
- Species Carex lonchosacca C.B.Clarke accepted as Carex petricosa Dewey
- Species Carex lonchosaccus C.B.Clarke accepted as Carex petricosa Dewey
- Species Carex longa Mack. accepted as Carex perlonga Fernald
- Species Carex longearistata Biv. accepted as Carex hispida Willd. ex Schkuhr
- Species Carex longebracteata Hornem.
- Species Carex longebracteata Steud. accepted as Carex myosurus Nees
- Species Carex longepedicellata Boeckeler accepted as Carex stenophylla subsp. stenophylloides (V.I.Krecz.) T.V.Egorova
- Species Carex longhiensis Franch. accepted as Carex longkiensis Franch.
- Species Carex longiacuminata Colenso accepted as Carex dissita Sol. ex Boott
- Species Carex longiaristata Biv. accepted as Carex hispida Willd. ex Schkuhr
- Species Carex longiaristata Boott ex Kurz accepted as Carex indica var. indica L.
- Species Carex longibracteata Hornem.
- Species Carex longibracteata Schleich. accepted as Carex disticha Huds.
- Species Carex longibracteata Dulac accepted as Carex pseudocyperus var. pseudocyperus L.
- Species Carex longifolia Burch. ex Hemsl. accepted as Carex dianae var. dianae Steud.
- Species Carex longifolia R.Br. accepted as Carex longibrachiata Boeckeler
- Species Carex longifolia Thuill. accepted as Carex rostrata var. rostrata Stokes
- Species Carex longifolia Host accepted as Carex umbrosa subsp. umbrosa Host
- Species Carex longipedicellata Boeckeler accepted as Carex stenophylla subsp. stenophylloides (V.I.Krecz.) T.V.Egorova
- Species Carex longipedunculata K.Schum. accepted as Carex petitiana subsp. petitiana A.Rich.
- Species Carex longirostris Krock. accepted as Carex laevigata Sm.
- Species Carex longirostris Torr. ex Schwein. accepted as Carex sprengelii Dewey ex Spreng.
- Species Carex longiseta Brot. accepted as Carex distachya var. distachya Desf.
- Species Carex longispica Boeckeler accepted as Carex speciosa subsp. speciosa Kunth
- Species Carex longispicata Hayata accepted as Carex kiotensis Franch. & Sav.
- Species Carex longisquamata Meinsh. ex Kom. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex longistipes Hayata accepted as Carex fulvorubescens subsp. longistipes (Hayata) T.Koyama
- Species Carex longistolon C.B.Clarke ex Franch. accepted as Carex sendaica Franch.
- Species Carex longkiensis Franch. accepted as Carex chinensis var. longkiensis (Franch.) Kük.
- Species Carex longqishanensis S.Yun Liang accepted as Carex manca subsp. takasagoana (Akiyama) T.Koyama
- Species Carex longxishanensis S.Yun Liang accepted as Carex manca subsp. takasagoana (Akiyama) T.Koyama
- Species Carex lorentziana Griseb. accepted as Carex boliviensis subsp. boliviensis Van Heurck & Müll.Arg.
- Species Carex loretii Rouy
- Species Carex loscosii Lange accepted as Carex mairei Coss. & Germ.
- Species Carex lucida Boott accepted as Carex flagellifera Colenso
- Species Carex lucida Clairv. accepted as Carex liparocarpos subsp. liparocarpos Gaudin
- Species Carex lucidula Franch. accepted as Carex sabynensis var. rostrata (Maxim.) Ohwi
- Species Carex lucorum Sartwell ex Boott accepted as Carex nigromarginata Schwein.
- Species Carex ludibunda J.Gay
- Species Carex lugens Holm accepted as Carex bigelowii subsp. lugens (Holm) T.V.Egorova
- Species Carex lumnitzeri (Rouy) V.I.Krecz. accepted as Carex divulsa Stokes
- Species Carex lumnitzeri Rouy accepted as Carex spicata Huds.
- Species Carex lunelliana Mack. accepted as Carex gravida L.H.Bailey
- Species Carex lurida L.H.Bailey accepted as Carex lupulina Muhl. ex Willd.
- Species Carex lurida C.B.Clarke accepted as Carex obscuriceps Kük.
- Species Carex lusitanica Willd. accepted as Carex paniculata subsp. lusitanica (Willd.) Maire
- Species Carex lutchuensis Ohwi accepted as Carex breviscapa C.B.Clarke
- Species Carex lutensis Kunth accepted as Carex clavata Thunb.
- Species Carex luteobrunnea Nelmes accepted as Carex nivalis Boott
- Species Carex luteola (Rchb.) Sendtn.
- Species Carex luteola Nees ex Boott accepted as Carex bracteosa (Kunze ex Rchb.) Kunth
- Species Carex lyallii Boott accepted as Carex raynoldsii Dewey
- Species Carex lyi H.Lév. & Vaniot accepted as Carex oxyphylla Franch.
- Species Carex lyonii Kurtz
- Species Carex lyonii Boott accepted as Carex microglochin Wahlenb.
- Species Carex macella Kunth accepted as Carex phalaroides Kunth
- Species Carex macilenta Fr. accepted as Carex mithala Callmé
- Species Carex macounii Dewey
- Species Carex macounii A.Benn. accepted as Carex lyngbyei Hornem.
- Species Carex macra Steud. accepted as Carex elata subsp. elata All.
- Species Carex macrandrolepsis H.Lév. accepted as Carex oxyphylla Franch.
- Species Carex macrantha Boeckeler accepted as Carex melanantha C.A.Mey.
- Species Carex macrocarpa Phil. accepted as Carex macrosolen Steud.
- Species Carex macrochlamys Franch. accepted as Carex laxa Wahlenb.
- Species Carex macrocystis Boeckeler accepted as Carex ecklonii Nees
- Species Carex macrogyna Turcz. ex Steud. accepted as Carex petricosa var. petricosa Dewey
- Species Carex macrogyna Turcz. accepted as Carex petricosa Dewey
- Species Carex macrokolea Steud. accepted as Carex verrucosa Muhl.
- Species Carex macrolepis D.Don accepted as Carex longipes var. longipes D.Don
- Species Carex macromollicula Nakai accepted as Carex planiculmis Kom.
- Species Carex macrophylla Hochst. ex Steud. accepted as Carex myosurus Nees
- Species Carex macropoda (Fernald) Mohlenbr. accepted as Carex digitalis var. macropoda Fernald
- Species Carex macrorhyncha Kar. & Kir. accepted as Carex parva Nees
- Species Carex macrosandra (Franch.) V.I.Krecz. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex macrosperma Mack. accepted as Carex humboldtiana Steud.
- Species Carex macrostachyos Link accepted as Cyperus macrostachys Link
- Species Carex macrothyrsa Miq. accepted as Carex rafflesiana Boott
- Species Carex macroura Meinsh. accepted as Carex pediformis var. macroura (Meinsh.) Kük.
- Species Carex maculata Turcz. ex Trevir. accepted as Carex atrofusca subsp. atrofusca Schkuhr
- Species Carex maculata Turcz. ex Steud. accepted as Carex coriophora subsp. coriophora Fisch. & C.A.Mey. ex Kunth
- Species Carex maculata Liebm. accepted as Carex spilocarpa Steud.
- Species Carex madoerensis C.B.Clarke accepted as Carex tricephala Boeckeler
- Species Carex magellanica Banks ex Boott accepted as Carex banksii var. banksii Boott
- Species Carex magnifica Dewey ex C.B.Clarke accepted as Carex obnupta L.H.Bailey
- Species Carex magnifolia Mack. accepted as Carex abscondita Mack.
- Species Carex magnursina Raymond accepted as Carex petricosa var. petricosa Dewey
- Species Carex maidenii Gand. accepted as Carex gaudichaudiana Kunth
- Species Carex mainensis Porter
- Species Carex mainensis Porter in Britton
- Species Carex mairiana St.-Lag. accepted as Carex mairei Coss. & Germ.
- Species Carex mairii Coss. & Germ. accepted as Carex mairei Coss. & Germ.
- Species Carex majae A.P.Khokhr. accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex malacocarpa H.Lév. & Vaniot accepted as Carex maculata Boott
- Species Carex malanshanensis R.F.Huang accepted as Carex atrofuscoides K.T.Fu
- Species Carex malato-belizii Raymond accepted as Carex lowei Bech.
- Species Carex malayana Nelmes accepted as Carex truncatigluma C.B.Clarke
- Species Carex malazena Steud. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex malinvaldi H.Lév. & Vaniot accepted as Carex scabrifolia Steud.
- Species Carex malvernensis S.Gibson accepted as Carex leporina L.
- Species Carex mandarinorum Raymond accepted as Carex glossostigma Hand.-Mazz.
- Species Carex manongarivensis Cherm. accepted as Carex kiotensis Franch. & Sav.
- Species Carex manostachys Spreng. accepted as Carex macrostachys Bertol.
- Species Carex mapaniifolia Ridl. accepted as Carex helferi Boeckeler
- Species Carex marchandiana Lapeyr. ex Spreng. accepted as Carex pyrenaica subsp. pyrenaica Wahlenb.
- Species Carex marcida J.F.Gmel.
- Species Carex marcida Boott accepted as Carex praegracilis W.Boott
- Species Carex marcida Raeusch. accepted as Carex praegracilis W.Boott
- Species Carex margaritifera Steud. accepted as Scleria secans (L.) Urb.
- Species Carex marginaria Franch. accepted as Carex heterolepis Bunge
- Species Carex marginata Gorter accepted as Carex disticha Huds.
- Species Carex marginata Muhl. ex Willd. accepted as Carex pensylvanica Lam.
- Species Carex mariae-victorinii Sennen accepted as Carex distans subsp. distans L.
- Species Carex mariesii C.B.Clarke accepted as Carex fernaldiana H.Lév. & Vaniot
- Species Carex maritima O.F.Müll. accepted as Carex paleacea Schreb. ex Wahlenb.
- Species Carex marshallii A.Benn.
- Species Carex marssonii Auersw. accepted as Carex demissa subsp. demissa Hornem.
- Species Carex martini Petrie accepted as Carex geminata Schkuhr
- Species Carex martini H.Lév. & Vaniot accepted as Carex rhynchophora var. rhynchophora Franch.
- Species Carex masoalensis Cherm. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex massonii Cay. & Lepage
- Species Carex matsudae (Hayata) Hayata ex Makino & Nemoto accepted as Carex dolichostachya subsp. dolichostachya Hayata
- Species Carex mauritanica Steud. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex mauritanica Boiss. & Reut. accepted as Carex reuteriana subsp. mauritanica (Boiss. & Reut.) Jim.Mejías & Luceño
- Species Carex maxima Scop. accepted as Carex pendula Huds.
- Species Carex maximowiczii Boeckeler accepted as Carex arnellii Christ ex Scheutz
- Species Carex maximowiczii F.Schmidt accepted as Carex schmidtii Meinsh.
- Species Carex mcclurgii Petrie accepted as Carex ventosa C.B.Clarke
- Species Carex mcmahonii Petrie accepted as Carex raoulii Boott
- Species Carex meadii Porter accepted as Carex tetanica Schkuhr
- Species Carex mediterranea C.B.Clarke ex Post accepted as Carex hispida Willd. ex Schkuhr
- Species Carex mediterranea Mack. accepted as Carex mesochorea Mack.
- Species Carex medwedewii Leskov accepted as Carex aterrima subsp. medwedewii (Leskov) T.V.Egorova
- Species Carex meekii Dewey accepted as Carex douglasii Boott
- Species Carex megacarpa T.Koyama accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex meinshauseniana V.I.Krecz. accepted as Carex tristis M.Bieb.
- Species Carex meiogyna Nees accepted as Carex filicina Nees
- Species Carex melaena Wimm. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex melananthoides Litv. ex V.I.Krecz. accepted as Carex melananthiformis Litv.
- Species Carex melanocephala Kar. & Kir. accepted as Carex melananthiformis Litv.
- Species Carex melanocephala Turcz. ex Kunth accepted as Carex melanocephala Turcz.
- Species Carex melanochloros Thuill. accepted as Carex elata subsp. elata All.
- Species Carex melanolepis Phil. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex melanolepis Boeckeler accepted as Carex orbicularis subsp. orbicularis Boott
- Species Carex melanophora S.T.Blake accepted as Carex sarawaketensis Kük.
- Species Carex melanostoma V.I.Krecz. accepted as Carex microchaeta subsp. nesophila (Holm) D.F.Murray
- Species Carex melanostylis Desv. accepted as Carex melanocystis É.Desv.
- Species Carex melastoma Fisch. ex Boott accepted as Carex spectabilis Dewey
- Species Carex melozitnensis A.E.Porsild accepted as Carex rotundata Wahlenb.
- Species Carex membranacea Hoppe accepted as Carex ericetorum Pollich
- Species Carex membranopacta L.H.Bailey accepted as Carex membranacea Hook.
- Species Carex mendica Lepage
- Species Carex menziesiana Sm. ex Boott accepted as Carex macrocephala Willd. ex Spreng.
- Species Carex mercarensis Hochst. ex Steud. accepted as Carex raphidocarpa Nees
- Species Carex meridiana (Akiyama) Akiyama accepted as Carex leucochlora var. meridiana Akiyama
- Species Carex merinoi Gand. accepted as Carex depressa subsp. depressa Link
- Species Carex merrillii Kük. accepted as Carex turrita var. merrillii (Kük.) Noot.
- Species Carex mertensis Weihe ex Kunth accepted as Carex vulpina L.
- Species Carex metteniana (O.Lang) C.B.Lehm. ex Schur accepted as Carex dioica L.
- Species Carex mexicana J.Presl & C.Presl accepted as Carex polystachya var. polystachya Sw. ex Wahlenb.
- Species Carex micans Boott accepted as Carex maculata Boott
- Species Carex michauxii Dewey accepted as Carex collinsii Nutt.
- Species Carex michauxii Schwein. accepted as Carex scirpoidea var. scirpoidea Michx.
- Species Carex micheliana Sm. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex michiganensis Dewey ex Alph.Wood accepted as Carex lucorum Willd.
- Species Carex microcephala C.A.Mey. accepted as Carex obtusata Lilj.
- Species Carex microlepis Boeckeler accepted as Carex diluta M.Bieb.
- Species Carex micropodioides V.I.Krecz. accepted as Carex pyrenaica subsp. micropodioides (V.I.Krecz.) Chandjian
- Species Carex microsacca C.B.Clarke accepted as Carex microsaccus C.B.Clarke
- Species Carex microsperma Steud. accepted as Carex flaccosperma Dewey
- Species Carex microsperma Wahlenb. accepted as Carex vulpinoidea Michx.
- Species Carex microspherma Wahl accepted as Carex microsperma Wahlenb.
- Species Carex microstachya Michx. accepted as Carex leptalea subsp. leptalea Wahlenb.
- Species Carex microstachyoides Montell accepted as Carex raciborskii Zapał.
- Species Carex microstoma Franch. accepted as Carex pallescens L.
- Species Carex microstyla J.Gay ex Gaudin
- Species Carex mielichhoferi Willd. ex Kunth accepted as Carex brachystachys Schrank
- Species Carex mielichhoferi Schkuhr accepted as Carex ferruginea Scop.
- Species Carex mielichhoferi Sm. accepted as Carex vaginata var. vaginata Tausch
- Species Carex miliacea Krock. accepted as Carex acuta L.
- Species Carex miliacea Schrank accepted as Carex distans subsp. distans L.
- Species Carex miliacea Muhl. ex Willd. accepted as Carex prasina Wahlenb.
- Species Carex millegrana Holm accepted as Carex emoryi Dewey
- Species Carex milnei Boott ex C.B.Clarke accepted as Carex indica var. indica L.
- Species Carex mimula V.I.Krecz. accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex minganinsularum Raymond accepted as Carex echinata subsp. echinata Murray
- Species Carex minima Boullu accepted as Carex bicolor Bellardi ex All.
- Species Carex minquinensis Z.P.Wang accepted as Carex fokienensis Dunn
- Species Carex minuscula (Kuvaev) Rebrist. accepted as Carex aquatilis var. minor Boott
- Species Carex minuta Franch. accepted as Carex cespitosa L.
- Species Carex minuticulmis S.W.Su & S.M.Xu accepted as Carex blinii H.Lév. & Vaniot
- Species Carex minutiflora Boeckeler accepted as Carex setigera var. setigera D.Don
- Species Carex mirabilis Dewey accepted as Carex normalis Mack.
- Species Carex mirabilis Host accepted as Carex simpliciuscula subsp. simpliciuscula Wahlenb.
- Species Carex mirata Dewey accepted as Carex atherodes Spreng.
- Species Carex misandra R.Br. accepted as Carex fuliginosa Schkuhr
- Species Carex misandroides Fernald accepted as Carex petricosa var. misandroides (Fernald) B.Boivin
- Species Carex miser Buckley accepted as Carex misera Buckley
- Species Carex misera Franch. accepted as Carex disperma Dewey
- Species Carex misera Phil. accepted as Carex melanocystis É.Desv.
- Species Carex miserabilis Mack. accepted as Carex scopulorum var. prionophylla (Holm) L.A.Standl.
- Species Carex mithala Callmé
- Species Carex mitis (P.J.Bergius) J.F.Gmel. accepted as Scleria mitis P.J.Bergius
- Species Carex mitoensis Ohwi accepted as Carex otaruensis Franch.
- Species Carex mitsuriokensis H.Lév. & Vaniot accepted as Carex globularis L.
- Species Carex mixta J.F.Gmel. accepted as Carex elata subsp. elata All.
- Species Carex mixta Corb. accepted as Carex subviridula Fernald
- Species Carex mixta Miégev. accepted as Carex umbrosa subsp. huetiana (Boiss.) Soó
- Species Carex modesta J.Gay accepted as Carex disticha Huds.
- Species Carex moelleri Phil. accepted as Carex setifolia var. setifolia
- Species Carex moenchiana Wender. accepted as Carex acuta L.
- Species Carex mohriana Mack. accepted as Carex atlantica subsp. capillacea (L.H.Bailey) Reznicek
- Species Carex mokkwaensis Akiyama accepted as Carex hattoriana Nakai ex Tuyama
- Species Carex mollis Host accepted as Carex caryophyllea Latourr.
- Species Carex mollis Gilib. accepted as Carex leporina L.
- Species Carex monadelpha Boott accepted as Carex tristachya var. tristachya Thunb.
- Species Carex mongolica A.I.Baranov & Skvortsov accepted as Carex lithophila Turcz.
- Species Carex moniezii Lagrange accepted as Carex vulpinoidea Michx.
- Species Carex monile Tuck. accepted as Carex vesicaria L.
- Species Carex monile Tuck. ex Boott accepted as Carex vesicaria L.
- Species Carex monilifera Thuill. accepted as Carex depauperata Curtis ex Woodw.
- Species Carex moniliformis Britton accepted as Carex silicea Olney
- Species Carex moniziana Lowe ex Boott accepted as Carex divisa Huds.
- Species Carex monopleura V.I.Krecz. accepted as Carex rochebrunei subsp. rochebrunei Franch. & Sav.
- Species Carex monosperma Macoun accepted as Carex gynocrates auct.
- Species Carex montamans Howe accepted as Carex baileyi Britton
- Species Carex montana Pollich ex Lightf. accepted as Carex praecox Schreb.
- Species Carex montanensis L.H.Bailey accepted as Carex podocarpa R.Br.
- Species Carex montanoaltaica Zolot.
- Species Carex montereyensis Mack. accepted as Carex harfordii Mack.
- Species Carex monticola Boeckeler accepted as Carex anisostachys Liebm.
- Species Carex monticola Dewey ex Torr. accepted as Carex triquetra Boott
- Species Carex montivaga S.T.Blake accepted as Carex breviculmis var. montivaga (S.T.Blake) Noot.
- Species Carex montivaga S.T.Blake ex Nelmes accepted as Carex breviculmis var. montivaga (S.T.Blake) Noot.
- Species Carex moravica Repka & Rolecek
- Species Carex moritzii Steud. accepted as Carex indica var. indica L.
- Species Carex moriyoshiensis Fujiw. & Y.Matsuda
- Species Carex morrisonicola Hayata accepted as Carex leucochlora var. aphanandra (Franch. & Sav.) T.Koyama
- Species Carex morrisseyi A.E.Porsild accepted as Carex adelostoma V.I.Krecz.
- Species Carex moscowensis C.B.Clarke accepted as Carex elata subsp. omskiana (Meinsh.) Jalas
- Species Carex mossii Nelmes accepted as Carex bequaertii subsp. mossii (Nelmes) Míguez, Martín-Bravo & Jim.-Mejías
- Species Carex motoskei Miq. accepted as Carex japonica Thunb.
- Species Carex mucronulata Holmb.
- Species Carex muehlenbergii Brongn. accepted as Carex brongniartii Kunth
- Species Carex muelleri Steud. accepted as Carex distachya var. distachya Desf.
- Species Carex muelleriana F.W.Schultz
- Species Carex muhlenbergii Kunth ex Boott accepted as Carex vulpinoidea Michx.
- Species Carex mukdenensis Kitag. accepted as Carex kirganica Kom.
- Species Carex mukdensis Kitag. accepted as Carex kirganica Kom.
- Species Carex multiceps Gaudin accepted as Carex elongata L.
- Species Carex multiculmis Ehrh. accepted as Carex elongata L.
- Species Carex multifiliculmis H.Lév. & Vaniot accepted as Carex subumbellata var. subumbellata Meinsh.
- Species Carex multiflora Muhl. ex Willd. accepted as Carex vulpinoidea Michx.
- Species Carex multiformis Thuill. accepted as Carex disticha Huds.
- Species Carex multimoda L.H.Bailey accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex multinervis Krock. accepted as Carex binervis Sm.
- Species Carex multinervis Boeckeler accepted as Carex tetanica Schkuhr
- Species Carex multinervis Krock. ex Steud. accepted as Carex binervis Sm.
- Species Carex multipes H.Lév. & Vaniot accepted as Carex nervata Franch. & Sav.
- Species Carex muricata Huds. accepted as Carex echinata subsp. echinata Murray
- Species Carex muricata Schltdl. & Cham. accepted as Carex brongniartii Kunth
- Species Carex muricata Desf. accepted as Carex divulsa Stokes
- Species Carex muricata Leers accepted as Carex echinata subsp. echinata Murray
- Species Carex muricata Jungh. accepted as Carex vulpina L.
- Species Carex murrii Appel ex Murr accepted as Carex sempervirens Vill.
- Species Carex musartiana Kük. ex V.I.Krecz. accepted as Carex podocarpa R.Br.
- Species Carex musartiana Kük. & V.I.Krecz. accepted as Carex podocarpa R.Br.
- Species Carex musashiensis Ohwi
- Species Carex musei Steud.
- Species Carex mutabilis Willd. accepted as Carex agastachys L.f.
- Species Carex mutans Boott ex C.B.Clarke accepted as Carex esenbeckii Kunth
- Species Carex mutica R.Br. accepted as Carex aurea Nutt.
- Species Carex myosuroides Lowe accepted as Carex pendula Huds.
- Species Carex myosuroides (Gaertn.) J.F.Gmel. accepted as Cyperus cyperinus (Retz.) Valck.Sur.
- Species Carex nagasakensis C.B.Clarke accepted as Carex ischnostachya var. ischnostachya Steud.
- Species Carex nagatadakensis Masam. accepted as Carex doenitzii Boeckeler
- Species Carex nakaharae Hayata accepted as Carex gentilis var. nakaharae (Hayata) T.Koyama
- Species Carex nakaii H.Lév. accepted as Carex disperma Dewey
- Species Carex nakiri Ohwi accepted as Carex lenta D.Don
- Species Carex nambuensis Franch. accepted as Carex reinii Franch. & Sav.
- Species Carex nana Boott accepted as Carex capillacea var. sachalinensis (F.Schmidt) Ohwi
- Species Carex nana Lam. accepted as Carex ferruginea Scop.
- Species Carex nana Cham. ex Steud. accepted as Carex krauseorum subsp. krauseorum Boeckeler
- Species Carex nanca Boott accepted as Carex ligata Boott
- Species Carex nanella Ohwi accepted as Carex callitrichos var. nana (H.Lév. & Vaniot) S.Yun Liang, L.K.Dai & Y.C.Tang
- Species Carex nanelliformis A.E.Kozhevn. accepted as Carex korkischkoae A.E.Kozhevn.
- Species Carex nangtciangensis Pamp. accepted as Cyperus nangtciangensis Pamp.
- Species Carex nankaiensis Honda accepted as Carex insaniae var. subdita (Ohwi) Ohwi
- Species Carex nardifolia Wahlenb. accepted as Carex aquatilis subsp. nardifolia (Wahlenb.) K.Richt.
- Species Carex naufragii Hochst. & Steud. accepted as Carex illegitima Ces.
- Species Carex naumanniana Boeckeler accepted as Carex conica var. conica Boott
- Species Carex navasii Merino accepted as Carex nigra subsp. intricata (Tineo ex Guss.) Rivas Mart.
- Species Carex nearctica Raymond ex Lepage accepted as Carex aquatilis var. minor Boott
- Species Carex nearctica Raymond accepted as Carex limula Fr.
- Species Carex nebrodensis Lojac.
- Species Carex neesiana Arn. ex Boott accepted as Carex lobulirostris Drejer
- Species Carex neesii S.R.Zhang accepted as Carex unciniiformis Boeckeler
- Species Carex neglecta (Peterm.) Peterm. accepted as Carex cespitosa L.
- Species Carex neglecta Degl. accepted as Carex distans subsp. distans L.
- Species Carex neglecta Tuck. accepted as Carex rosea Willd.
- Species Carex nelmesii H.E.Hess accepted as Carex tricholepis Nelmes
- Species Carex nemarosa Kunth accepted as Carex leiorhyncha C.A.Mey.
- Species Carex nematosperma Willd. ex Kunth accepted as Carex laxiflora var. laxiflora Lam.
- Species Carex nematostachya Cham. ex V.I.Krecz. accepted as Carex falcata Turcz.
- Species Carex nemorensis J.F.Gmel. accepted as Carex pilosa Scop.
- Species Carex nemorosa Schrank accepted as Carex alba Scop.
- Species Carex nemorosa Lumn. accepted as Carex divulsa Stokes
- Species Carex nemorosa Rebent. accepted as Carex otrubae Podp.
- Species Carex nemorosa J.F.Gmel. accepted as Carex pilosa Scop.
- Species Carex nenningiana Opiz
- Species Carex neobigelowii Lepage
- Species Carex neofilipendula Lepage
- Species Carex neofilipes Nakai accepted as Carex tenuiformis var. neofilipes Ohwi ex Hatus.
- Species Carex neoguineensis C.B.Clarke accepted as Carex filicina Nees
- Species Carex neokukenthaliana H.Lév. & Vaniot accepted as Carex lanceolata var. lanceolata Boott
- Species Carex neomexicana Mack. accepted as Carex occidentalis L.H.Bailey
- Species Carex neomiliaris Lepage
- Species Carex neopaleacea Lepage accepted as Carex paleacea Schreb. ex Wahlenb.
- Species Carex neorigida Lepage
- Species Carex neosachalinensis A.E.Kozhevn. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex nepalensis Spreng. accepted as Carex longipes var. longipes D.Don
- Species Carex nervosa Willd. ex Kunth accepted as Carex distans subsp. distans L.
- Species Carex nervosa Desf. accepted as Carex extensa Gooden.
- Species Carex nervulosa Franch. accepted as Carex shimidzensis Franch.
- Species Carex nesophila Holm accepted as Carex microchaeta subsp. nesophila (Holm) D.F.Murray
- Species Carex neurochlaena Holm accepted as Carex heleonastes subsp. neurochlaena (Holm) Böcher
- Species Carex neurochlamys F.Muell. accepted as Carex maculata Boott
- Species Carex nexa Boott accepted as Carex ligata Boott
- Species Carex nicoloffii Pamp.
- Species Carex nigella Boott accepted as Carex spectabilis Dewey
- Species Carex nigra Schkuhr accepted as Carex aterrima subsp. aterrima Hoppe
- Species Carex nigra All. accepted as Carex parviflora Host
- Species Carex nigricans Kit. accepted as Carex pilosa Scop.
- Species Carex nigricans Hombr. ex Boott accepted as Carex darwinii var. darwinii Boott
- Species Carex nigricans Dewey accepted as Carex dioica L.
- Species Carex nigrita Fisch. ex Worosch. accepted as Carex pluriflora Hultén
- Species Carex nigritella Drejer accepted as Carex stylosa C.A.Mey.
- Species Carex nigrolutea Gaudin accepted as Carex flacca subsp. flacca Schreb.
- Species Carex niigatensis Koidz. accepted as Carex foliosissima var. foliosissima F.Schmidt
- Species Carex nikaii T.Koyama
- Species Carex nikoensis Franch. & Sav. accepted as Carex satsumensis Franch. & Sav.
- Species Carex niko-montana Akiyama accepted as Carex sachalinensis var. longiuscula Ohwi
- Species Carex nilagirica Hochst. ex Steud. accepted as Carex filicina Nees
- Species Carex nilagirica Viji, Pandur., Deepu & G.C.Tucker accepted as Carex panduranganii Kalidass
- Species Carex ninae Melnikov accepted as Carex capillifolia (Decne.) S.R.Zhang
- Species Carex ninagongensis (Kük.) Nelmes ex Robyns & Tournay accepted as Carex mannii subsp. mannii E.A.Bruce
- Species Carex nipponica Franch. accepted as Carex maackii Maxim.
- Species Carex nitens Phil. accepted as Carex gayana Desv.
- Species Carex nitida Host accepted as Carex liparocarpos subsp. liparocarpos Gaudin
- Species Carex nitida Hoppe accepted as Carex mucronata All.
- Species Carex nitidiutriculata L.K.Dai accepted as Carex desponsa Boott
- Species Carex nivalis Cham. ex Steud. accepted as Carex micropoda C.A.Mey.
- Species Carex nivicola G.Don ex Boott accepted as Carex vaginata var. vaginata Tausch
- Species Carex nobilis Boott accepted as Carex myosurus Nees
- Species Carex nordmannii A.Kern. ex Palla accepted as Carex tomentosa L.
- Species Carex norvegica Willd. ex Schkuhr accepted as Carex mackenziei V.I.Krecz.
- Species Carex notholimosioides Doweld
- Species Carex notoleia Nees accepted as Carex wallichiana Spreng.
- Species Carex novae-selandiae Boeckeler accepted as Carex fascicularis Sol. ex Boott
- Species Carex novae-zelandiae Petrie accepted as Carex rubicunda Petrie
- Species Carex novograblenovii Kom. accepted as Carex williamsii Britton
- Species Carex nubens Lepage accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex nubicola Mack. accepted as Carex haydeniana Olney
- Species Carex nuda Lam. accepted as Carex leporina L.
- Species Carex nugata Ohwi accepted as Carex rugata Ohwi
- Species Carex nuptialis Boott accepted as Carex wahuensis subsp. wahuensis C.A.Mey.
- Species Carex nutans J.F.Gmel. accepted as Carex cespitosa L.
- Species Carex nutans Host accepted as Carex melanostachya M.Bieb. ex Willd.
- Species Carex nutans Raeusch. accepted as Carex cespitosa L.
- Species Carex nuttallii Dewey accepted as Carex douglasii Boott
- Species Carex nyasensis C.B.Clarke accepted as Carex spicatopaniculata Boeckeler ex C.B.Clarke
- Species Carex oahuensis Hillebr. accepted as Carex wahuensis subsp. wahuensis C.A.Mey.
- Species Carex oakesiana Torr. accepted as Carex oligosperma Michx.
- Species Carex oaxacana L.H.Bailey accepted as Carex anisostachys Liebm.
- Species Carex oberrodensis B.Walln.
- Species Carex obesa Schleich. ex Kunth accepted as Carex cespitosa L.
- Species Carex obesa All. accepted as Carex nigra subsp. alpina (Gaudin) Lemke
- Species Carex oblata L.H.Bailey accepted as Carex ablata L.H.Bailey
- Species Carex obliqua Turcz. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex oblita Steud. accepted as Carex venusta Dewey
- Species Carex oblonga J.F.Gmel.
- Species Carex oblonga Nelmes accepted as Carex rafflesiana Boott
- Species Carex obovata Goldb. ex Trevir. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex obovata Goldb. ex Ledeb. accepted as Carex pediformis C.A.Mey.
- Species Carex obovoidea Cronquist accepted as Carex cusickii Mack.
- Species Carex obtusa Kit.
- Species Carex obtusangula Kunth accepted as Carex flacca subsp. flacca Schreb.
- Species Carex obtusangula Salzm. ex Boott accepted as Carex hispida Willd. ex Schkuhr
- Species Carex obtusangula Ehrh. accepted as Carex rostrata var. rostrata Stokes
- Species Carex obtusisquama (Gross) G.A.Wheeler & S.Beck accepted as Carex crassiflora Kük.
- Species Carex obtusobracteata Hayata accepted as Carex breviscapa C.B.Clarke
- Species Carex occultans (Franch.) V.I.Krecz. accepted as Carex lasiocarpa var. occultans (Franch.) Kük.
- Species Carex ochrolepis Franch. accepted as Carex jackiana Boott
- Species Carex ochroleuca Cham. ex Steud. accepted as Carex saxatilis L.
- Species Carex ochrostachya Phil. accepted as Carex banksii var. banksii Boott
- Species Carex odontolepis Phil. accepted as Carex banksii var. odontolepis (Phil.) Kük.
- Species Carex oederi Willk. accepted as Carex lepidocarpa subsp. nevadensis (Boiss. & Reut.) Luceño
- Species Carex oederi Retz. ex Ehrh. accepted as Carex oederi Retz.
- Species Carex oederoides Tatew. & Akiyama accepted as Carex oederi var. oederi Retz.
- Species Carex oedocarpa Andersson accepted as Carex demissa subsp. demissa Hornem.
- Species Carex oedorrhampha Nelmes accepted as Carex tumida Boott
- Species Carex oenensis A.Neumann ex B.Walln.
- Species Carex oerstedii Liebm. accepted as Carex polystachya var. polystachya Sw. ex Wahlenb.
- Species Carex ogawai Akiyama accepted as Carex reinii Franch. & Sav.
- Species Carex ohiotica Hochst. & Steud. accepted as Carex shortiana Dewey & Torr.
- Species Carex ohmuelleriana O.Lang
- Species Carex ohuboi Franch. accepted as Carex okuboi Franch.
- Species Carex ohwii Masam. accepted as Carex omiana var. yakushimana Ohwi
- Species Carex okesiana Dewey accepted as Carex oligosperma Michx.
- Species Carex okesii Eaton accepted as Carex oligosperma Michx.
- Species Carex okushirensis Akiyama accepted as Carex conica var. conica Boott
- Species Carex oldhamii C.B.Clarke accepted as Carex rara subsp. rara Boott
- Species Carex olgae Regel accepted as Carex acutiformis Ehrh.
- Species Carex oligandra F.Muell. ex Boott accepted as Carex buxbaumii Wahlenb.
- Species Carex oligantha Boott accepted as Carex camptoglochin V.I.Krecz.
- Species Carex oligantha Phil. accepted as Carex melanocystis É.Desv.
- Species Carex oligocarpa Muhl. ex Boott accepted as Carex digitalis var. digitalis Willd.
- Species Carex oligocarpa Hornem. ex Boott accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex oligogyna Less. ex Kunth accepted as Carex globularis L.
- Species Carex oligophylla Freyn accepted as Carex cespitosa L.
- Species Carex oligostachys Meinsh. ex Maxim. accepted as Carex filipes var. oligostachys Kük.
- Species Carex olivacea Liebm. accepted as Carex anisostachys Liebm.
- Species Carex oliveri Boeckeler accepted as Carex nivalis Boott
- Species Carex oliveriana J.Gay ex Boiss. accepted as Carex illegitima Ces.
- Species Carex olympica Mack. accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex olyssiponensis Steud. accepted as Carex distachya var. distachya Desf.
- Species Carex omskiana Meinsh.
- Species Carex oneillii Lepage
- Species Carex ontakensis Franch. & Sav. accepted as Carex capillacea var. capillacea Boott
- Species Carex ontakensis H.Lév. accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex onusta Mack. accepted as Carex muehlenbergii var. enervis Boott
- Species Carex opetiola Raeusch. accepted as Cyperus cyperinus (Retz.) Valck.Sur.
- Species Carex ophiopogon H.Lév. accepted as Carex nubigena subsp. nubigena D.Don
- Species Carex oranensis Trab. accepted as Carex distans subsp. oranensis (Trab.) Jahand. & Maire
- Species Carex orbelica Velen. accepted as Carex curvula subsp. curvula All.
- Species Carex oreades C.A.Mey. accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex oregonensis Olney ex A.Gray accepted as Carex halliana L.H.Bailey
- Species Carex oregonensis Olney ex L.H.Bailey accepted as Carex halliana L.H.Bailey
- Species Carex orientalis Meinsh. accepted as Carex turkestanica Regel
- Species Carex ormantha (Fernald) Mack. accepted as Carex echinata subsp. echinata Murray
- Species Carex ornithopodioides Hausm. accepted as Carex ornithopoda subsp. ornithopodioides (Hausm.) Nyman
- Species Carex ornithorhyncha Boott accepted as Carex crus-corvi Shuttlew. ex Kunze
- Species Carex orostachys C.A.Mey. accepted as Carex orthostachys C.A.Mey.
- Species Carex orsiniana Ten. accepted as Carex muricata subsp. muricata L.
- Species Carex ortegae Phil. accepted as Carex caduca Boott
- Species Carex orthocaula V.I.Krecz. accepted as Carex maritima Gunnerus
- Species Carex orthostachys C.A.Mey. accepted as Carex atherodes Spreng.
- Species Carex orthostachys Rupr. accepted as Carex atherodes Spreng.
- Species Carex orthostachys Trev. ex Nyman accepted as Carex atherodes Spreng.
- Species Carex ostrobottnica Saxén accepted as Carex halophila var. halophila F.Nyl.
- Species Carex ouensanensis Ohwi accepted as Carex cinerascens Kük.
- Species Carex ovalis Gooden. accepted as Carex leporina L.
- Species Carex ovalis Willd. ex Kunth accepted as Carex scoparia Schkuhr ex Willd.
- Species Carex ovata Burm.f. accepted as Abildgaardia ovata (Burm.f.) Kral
- Species Carex ovata Rudge accepted as Carex atratiformis Britton
- Species Carex ovata Merino accepted as Carex binervis Sm.
- Species Carex ovata C.A.Mey. accepted as Carex curvula subsp. curvula All.
- Species Carex ovata Honck. accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex ovczinnikovii (T.V.Egorova) Melnikov accepted as Carex capillifolia (Decne.) S.R.Zhang
- Species Carex owerinii Melnikov accepted as Carex capillifolia (Decne.) S.R.Zhang
- Species Carex owyheensis A.Nelson accepted as Carex luzulina var. ablata (L.H.Bailey) F.J.Herm.
- Species Carex oxycarpa Holm accepted as Carex angustata Boott
- Species Carex oxyleuca V.I.Krecz. accepted as Carex atrofusca subsp. minor (Boott) T.Koyama
- Species Carex pachinensis Hayata accepted as Carex metallica H.Lév.
- Species Carex pachyrrhiza Franch. accepted as Carex setosa var. setosa Boott
- Species Carex pachystoma Holm accepted as Carex aquatilis var. dives (Holm) Kük.
- Species Carex pacifica Drejer accepted as Carex cespitosa L.
- Species Carex paczoskii Zapał.
- Species Carex paddoensis Suksd. accepted as Carex engelmannii L.H.Bailey
- Species Carex pagesii H.Lév. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex paishanensis Nakai accepted as Carex atrata subsp. atrata L.
- Species Carex pakistanica T.Koyama accepted as Carex orbicularis subsp. orbicularis Boott
- Species Carex paleaceoides Lepage accepted as Carex paleacea Schreb. ex Wahlenb.
- Species Carex paleata Boott accepted as Carex berteroniana Steud.
- Species Carex palentina Losa & P.Monts. accepted as Carex liparocarpos subsp. liparocarpos Gaudin
- Species Carex palezieuxii Kneuck. accepted as Carex laggeri Wimm.
- Species Carex pallens Z.P.Wang accepted as Carex fibrillosa Franch. & Sav.
- Species Carex pallens (Fristedt) Harmaja accepted as Carex pallidula Harmaja
- Species Carex pallida C.A.Mey. accepted as Carex accrescens Ohwi
- Species Carex pallida Salisb. accepted as Carex pallescens L.
- Species Carex pallidior Degl. accepted as Carex punctata Gaudin
- Species Carex paludicola (Ohwi) Ohwi accepted as Carex aphyllopus var. aphyllopus Kük.
- Species Carex paludicola Merino accepted as Carex durieui Steud. ex Kunze
- Species Carex paludivagans W.H.Drury
- Species Carex paludosa Gooden. accepted as Carex acutiformis Ehrh.
- Species Carex palustris J.F.Gmel. accepted as Carex acutiformis Ehrh.
- Species Carex palustris Suter accepted as Carex acutiformis Ehrh.
- Species Carex pamirica (O.Fedtsch.) O.Fedtsch. & B.Fedtsch. accepted as Carex pamirensis C.B.Clarke
- Species Carex pamiroalaica (N.A.Ivanova) Melnikov accepted as Carex deasyi (C.B.Clarke) O.Yano & S.R.Zhang
- Species Carex pampae Kalela accepted as Carex atropicta Steud.
- Species Carex panda C.B.Clarke accepted as Carex aquatilis var. dives (Holm) Kük.
- Species Carex pandanophylla E.G.Camus accepted as Carex scaposa C.B.Clarke
- Species Carex pandanus Ohwi accepted as Carex graeffeana Boeckeler
- Species Carex panicea J.Carey accepted as Carex meadii Dewey
- Species Carex paniculigera Nakai accepted as Carex planiculmis Kom.
- Species Carex pannewitziana Figert accepted as Carex involuta (Bab.) Syme
- Species Carex papillaticulmis Ohwi accepted as Carex insaniae var. papillaticulmis (Ohwi) Ohwi
- Species Carex papillosa Nees accepted as Carex bonariensis var. bonariensis Desf. ex Poir.
- Species Carex paponii Muret ex T.Durand & Pittier
- Species Carex papuana Nelmes accepted as Carex lamprochlamys S.T.Blake
- Species Carex paradoxa Willd. accepted as Carex appropinquata Schumach.
- Species Carex paradoxa Benth. accepted as Carex divisa Huds.
- Species Carex paradoxa J.F.Gmel. accepted as Carex ericetorum Pollich
- Species Carex paradoxa Kit. accepted as Carex prolifera Kit.
- Species Carex paraguayensis Maury ex Micheli accepted as Carex moesta Kunth
- Species Carex paralia V.I.Krecz. accepted as Carex paleacea Schreb. ex Wahlenb.
- Species Carex parasitica Kunze accepted as Carex monostachya A.Rich.
- Species Carex parentii Jac.Koopman, Beusekom & WiÄ™cław
- Species Carex parkeri Petrie accepted as Carex lachenalii subsp. parkeri (Petrie) Toivonen
- Species Carex parvibracteata Nees accepted as Carex psychrophila Nees
- Species Carex parviflora C.A.Mey. accepted as Carex melanocephala Turcz.
- Species Carex parviflora Gaudin accepted as Carex lachenalii subsp. lachenalii Schkuhr
- Species Carex parviflora C.A.Mey. ex Kunth accepted as Carex melanocephala Turcz.
- Species Carex patens Franch. accepted as Carex doniana Spreng.
- Species Carex patuensis Lepage
- Species Carex patula Host accepted as Carex flava L.
- Species Carex patula Schkuhr accepted as Carex laevigata Sm.
- Species Carex patula Huds. accepted as Carex pauciflora Lightf.
- Species Carex patula Scop. accepted as Carex sylvatica subsp. sylvatica Huds.
- Species Carex paucicostata Mack. accepted as Carex kelloggii var. impressa (L.H.Bailey) B.L.Wilson & Otting
- Species Carex pauciflora Balb. ex Boott accepted as Carex microglochin Wahlenb.
- Species Carex paucifructus Mack. accepted as Carex mariposana L.H.Bailey ex Mack.
- Species Carex paucimascula H.Lév. & Vaniot accepted as Carex lanceolata var. lanceolata Boott
- Species Carex pauliana F.W.Schultz
- Species Carex paulii Asch. & Graebn.
- Species Carex paupera Nelmes accepted as Carex inversa R.Br.
- Species Carex paupercula Michx. accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex pauxilla V.I.Krecz. accepted as Carex podocarpa R.Br.
- Species Carex pauzhetica A.E.Kozhevn. accepted as Carex oxyandra var. pauzhetica (A.E.Kozhevn.) A.E.Kozhevn.
- Species Carex payettei J.Cay.
- Species Carex pedata Wahlenb. accepted as Carex glacialis Mack.
- Species Carex pedata L. accepted as Carex ornithopoda subsp. ornithopoda Willd.
- Species Carex pedata All. accepted as Carex ornithopoda subsp. ornithopoda Willd.
- Species Carex pedicellata (Dewey) Britton accepted as Carex austrina Mack.
- Species Carex pedicellata Phil. accepted as Carex decidua Boott
- Species Carex peduncularis Wall. ex Boott accepted as Carex speciosa subsp. speciosa Kunth
- Species Carex pedunculata Willd. ex Roxb. accepted as Carex dianae Steud.
- Species Carex pedunculifera Kom. accepted as Carex lyngbyei Hornem.
- Species Carex peiana F.T.Wang & Tang accepted as Carex eminens Nees
- Species Carex pelia O.Lang accepted as Carex panicea L.
- Species Carex pellucida Turcz. ex Boott accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex pendula Geners. accepted as Carex capillaris subsp. capillaris L.
- Species Carex pendula Schreb. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex pendula Moench accepted as Carex vesicaria L.
- Species Carex pendulina Lojac.
- Species Carex peniculacea H.Lév. & Vaniot accepted as Carex otaruensis Franch.
- Species Carex pennsylvanica Torr. accepted as Carex albicans Willd. ex Spreng.
- Species Carex pentacarpa Boeckeler accepted as Carex rafflesiana Boott
- Species Carex pentastachys Fisch. ex Steud.
- Species Carex peraffinis Appel accepted as Carex bolina O.Lang
- Species Carex peraltae Phil. accepted as Carex atropicta Steud.
- Species Carex perangusta Ohwi accepted as Carex discoidea var. perangusta (Ohwi) Katsuy.
- Species Carex perciliata (Kük.) Nelmes accepted as Carex breviculmis var. perciliata Kük.
- Species Carex perennis Krock. accepted as Carex montana L.
- Species Carex perennis Krock. ex Steud. accepted as Carex montana L.
- Species Carex perfusca V.I.Krecz. accepted as Carex aterrima subsp. aterrima Hoppe
- Species Carex pergrandis V.I.Krecz. & Luchnik accepted as Carex atherodes Spreng.
- Species Carex periculosa Honda accepted as Carex heterolepis Bunge
- Species Carex perileia S.T.Blake accepted as Carex echinata subsp. echinata Murray
- Species Carex perpusilla Meinsh. ex Krecz. accepted as Carex onoei Franch. & Sav.
- Species Carex perrieri H.Lév. accepted as Carex hirtigluma var. perrieri (H.Lév.) Gehrke
- Species Carex persalina Lepage
- Species Carex persica Nelmes accepted as Carex divulsa Stokes
- Species Carex personata (Fr.) C.B.Clarke accepted as Carex acuta L.
- Species Carex personii Schkuhr ex Kunth accepted as Carex wahlenbergiana Boott
- Species Carex persoonii W.D.J.Koch accepted as Carex brunnescens subsp. brunnescens (Pers.) Poir.
- Species Carex persoonii Sieber ex O.Lang accepted as Carex canescens subsp. canescens L.
- Species Carex perstricta Mack. accepted as Carex schiedeana Kunze
- Species Carex peruviana Dombey ex Boott accepted as Carex extensa Gooden.
- Species Carex peruvida G.A.Wheeler accepted as Carex purdiei Boott
- Species Carex peshemskyi Malyschev accepted as Carex williamsii Britton
- Species Carex petecticalis Nelmes accepted as Carex teres Boott
- Species Carex petersii C.A.Mey. ex F.Schmidt accepted as Carex vaginata var. petersii (C.A.Mey. ex F.Schmidt) Akiyama
- Species Carex petraea Wahlenb. accepted as Carex rupestris subsp. rupestris All.
- Species Carex petraefurvae Murr accepted as Carex flacca subsp. flacca Schreb.
- Species Carex petunnikowii Litv. accepted as Carex orbicularis subsp. orbicularis Boott
- Species Carex phacelostachys Nelmes accepted as Carex verticillata Zoll. & Moritzi
- Species Carex phacodes C.B.Clarke accepted as Carex phacota Spreng.
- Species Carex phaecostachya Sm. accepted as Carex vaginata var. vaginata Tausch
- Species Carex phaeolepis Holm accepted as Carex vallicola Dewey
- Species Carex phaeoleuca Ohwi accepted as Carex nubigena var. franchetiana Ohwi
- Species Carex phaeopoda Ohwi accepted as Carex kiotensis Franch. & Sav.
- Species Carex phaeostachya Sm. accepted as Carex vaginata var. vaginata Tausch
- Species Carex pharensis Vis. accepted as Carex illegitima Ces.
- Species Carex philippinensis Nelmes accepted as Carex graeffeana Boeckeler
- Species Carex phillippii L.H.Bailey accepted as Carex hispida Willd. ex Schkuhr
- Species Carex philocrena V.I.Krecz. accepted as Carex oederi var. oederi Retz.
- Species Carex phoenocarpa Franch. accepted as Carex phaenocarpa Franch.
- Species Carex phyllomanica W.Boott accepted as Carex echinata subsp. phyllomanica (W.Boott) Reznicek
- Species Carex phyllophora Kunth accepted as Carex pauciflora Lightf.
- Species Carex physema Dewey accepted as Carex bullata Willd.
- Species Carex physocarpa Nees ex Boott accepted as Carex acutata Boott
- Species Carex physocarpa J.Presl & C.Presl accepted as Carex saxatilis L.
- Species Carex physocarpoides Lepage
- Species Carex physochlaena Holm accepted as Carex membranacea Hook.
- Species Carex physochynchia Steud. accepted as Carex physorhyncha Liebm. ex Steud.
- Species Carex physorhyncha Liebm. ex Steud. accepted as Carex albicans var. australis (L.H.Bailey) Rettig
- Species Carex picea Franch. accepted as Carex buxbaumii Wahlenb.
- Species Carex picta Boott accepted as Carex maximowiczii Miq.
- Species Carex pieperiana Junge accepted as Carex ruedtii Kneuck.
- Species Carex pierotii Miq. accepted as Carex scabrifolia Steud.
- Species Carex pilosiuscula Gobi
- Species Carex pilosiuscula Boeckeler accepted as Carex whitneyi Olney
- Species Carex pilulifera Geners. ex Boott accepted as Carex praecox Schreb.
- Species Carex pineticola Ohwi accepted as Carex sachalinensis var. iwakiana Ohwi
- Species Carex pinetorum Willd. ex Kunth accepted as Carex muehlenbergii var. muehlenbergii Willd.
- Species Carex pinetorum Liebm. accepted as Carex peucophila Holm
- Species Carex pinetorum Willd. ex Schltdl. accepted as Carex peucophila Holm
- Species Carex pinguis L.H.Bailey accepted as Carex adusta Boott
- Species Carex piniaria Bosc ex Boott accepted as Carex muehlenbergii var. muehlenbergii Willd.
- Species Carex pinnata Moench ex Rchb. accepted as Carex elongata L.
- Species Carex piperi Mack. accepted as Carex praticola Rydb.
- Species Carex piptolepis Desv. accepted as Carex setifolia var. setifolia
- Species Carex pirinensis (Acht.) Acht. accepted as Carex parviflora Host
- Species Carex piroskana Nyár. accepted as Carex digitata L.
- Species Carex pisanensis T.Koyama accepted as Carex laeta subsp. laeta Boott
- Species Carex pissisi Phil. accepted as Carex setifolia var. setifolia
- Species Carex pittieri Boeckeler accepted as Carex donnell-smithii L.H.Bailey
- Species Carex plagiostoma Nelmes accepted as Carex horsfieldii Boott
- Species Carex plana Mack. accepted as Carex muehlenbergii var. enervis Boott
- Species Carex planifolia Kohts accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex plantaginea Muhl. accepted as Carex laxiflora var. laxiflora Lam.
- Species Carex platycarpa Hochst. ex Steud. accepted as Carex phacota Spreng.
- Species Carex platycarpos Rchb.
- Species Carex platylepis Mack. accepted as Carex praticola Rydb.
- Species Carex platyphylla Franch. accepted as Carex siderosticta Hance
- Species Carex platyrhina Ohwi accepted as Carex speciosa subsp. platyrhina (Ohwi) T.Koyama
- Species Carex platyrhyncha Franch. & Sav. accepted as Carex pumila Thunb.
- Species Carex platyrhyncha French. & Savat. accepted as Carex pumila Thunb.
- Species Carex platystachys Ten. accepted as Carex macrolepis DC.
- Species Carex plebeia C.B.Clarke accepted as Carex continua C.B.Clarke
- Species Carex pleiandra Ohwi accepted as Carex amgunensis F.Schmidt
- Species Carex pleiorhiza H.Lév. & Vaniot accepted as Carex jackiana Boott
- Species Carex pleistogyna V.I.Krecz. accepted as Carex nubigena subsp. nubigena D.Don
- Species Carex plena Clairv. accepted as Carex capillaris L.
- Species Carex plesiocephala Turrill accepted as Carex tricephala Boeckeler
- Species Carex plocamostyla Maxim. accepted as Carex doenitzii Boeckeler
- Species Carex ploegii Jac.Koopman
- Species Carex ploettneriana Beyer
- Species Carex plumbea (Wahlenb.) Willd. accepted as Carex riparia Curtis
- Species Carex pluvia R.W.Krauss accepted as Carex alligata Boott
- Species Carex pocilliformis Boott accepted as Carex tristachya var. pocilliformis (Boott) Kük.
- Species Carex podostachys Steud. accepted as Carex digitalis var. digitalis Willd.
- Species Carex podperae Otruba accepted as Carex acuta L.
- Species Carex poiformis (Retz.) J.F.Gmel. accepted as Scleria poiformis Retz.
- Species Carex poiretii J.F.Gmel. accepted as Fuirena pubescens var. pubescens (Poir.) Kunth
- Species Carex polamostauros Steudel ex Lechler accepted as Carex aematorrhyncha Desv.
- Species Carex pollens C.B.Clarke accepted as Carex dispalata subsp. dispalata Boott
- Species Carex polyandra Schkuhr accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex polyantha Franch. & Sav. accepted as Carex prescottiana Boott
- Species Carex polygama J.F.Gmel.
- Species Carex polygama Schkuhr accepted as Carex buxbaumii Wahlenb.
- Species Carex polygyna Boeckeler accepted as Carex esenbeckii Kunth
- Species Carex polymorpha Torr. accepted as Carex striata Michx.
- Species Carex polymorpha Schwein. ex Boott accepted as Carex vulpinoidea Michx.
- Species Carex polyneura Colenso accepted as Carex dissita Sol. ex Boott
- Species Carex polyrrhiza Wallr. accepted as Carex umbrosa subsp. umbrosa Host
- Species Carex polystachya A.Rich. accepted as Carex geminata Schkuhr
- Species Carex polystachya R.Lesson ex A.Rich. accepted as Carex lessoniana Steud.
- Species Carex polystachya Lesson & A.Rich. accepted as Carex lessoniana Steud.
- Species Carex polytrichoides Muhl. ex Willd. accepted as Carex leptalea subsp. leptalea Wahlenb.
- Species Carex pomiensis Y.C.Yang accepted as Carex pulchra Boott
- Species Carex ponmoshiriensis Miyabe & Kudô accepted as Carex planata var. planata Franch. & Sav.
- Species Carex portae K.Richt. accepted as Carex distans subsp. distans L.
- Species Carex porteri Olney accepted as Carex crinita var. porteri (Olney) Fernald
- Species Carex posnaniensis Sprib. accepted as Carex repens Bellardi
- Species Carex potamostauros Steud. accepted as Carex aematorrhyncha var. aematorhyncha Desv.
- Species Carex praealta Boott accepted as Carex dianae var. dianae Steud.
- Species Carex praeceps Borkh. ex Rchb. accepted as Carex praecox Schreb.
- Species Carex praecox J.Jundz. accepted as Carex brizoides L.
- Species Carex praecox Jacq. accepted as Carex caryophyllea Latourr.
- Species Carex praecox Pollich ex Steud. accepted as Carex montana L.
- Species Carex praestabilis Ohwi accepted as Carex sabynensis var. rostrata (Maxim.) Ohwi
- Species Carex praestans C.B.Clarke accepted as Carex myosurus Nees
- Species Carex praetutiana Parl. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex prahliana Junge
- Species Carex prainii C.B.Clarke accepted as Carex perakensis var. perakensis C.B.Clarke
- Species Carex pratensis Hosé accepted as Carex acuta L.
- Species Carex pratensis Phil. accepted as Carex hispida Willd. ex Schkuhr
- Species Carex pratensis Drejer accepted as Carex praticola Rydb.
- Species Carex prattii Franch. accepted as Carex melanantha C.A.Mey.
- Species Carex preussii K.Schum. accepted as Carex petitiana subsp. petitiana A.Rich.
- Species Carex prevernalis Kitag. accepted as Carex lanceolata var. subpediformis Kük.
- Species Carex pribylovensis Macoun accepted as Carex glareosa subsp. pribylovensis (Macoun) G.Halliday & Chater
- Species Carex princeps Kunth accepted as Carex praecox Schreb.
- Species Carex prionocarpa Franch. accepted as Carex lyngbyei Hornem.
- Species Carex prionophylla Holm accepted as Carex scopulorum var. prionophylla (Holm) L.A.Standl.
- Species Carex procera Griseb. accepted as Carex procera Kunth
- Species Carex procera Kunth accepted as Carex brasiliensis A.St.-Hil.
- Species Carex procerula V.I.Krecz. accepted as Carex saxatilis L.
- Species Carex prolifera Kit.
- Species Carex prolixa Fr.
- Species Carex prolixa Schur accepted as Carex stricta Lam.
- Species Carex promaucana Phil. accepted as Carex banksii var. banksii Boott
- Species Carex propinqua Nees & Meyen ex Kunth accepted as Carex macloviana var. thermarum (Phil.) Kük.
- Species Carex propinqua Nees & Meyen in Meyen accepted as Carex macloviana var. thermarum (Phil.) Kük.
- Species Carex prostii Chass. ex P.Fourn.
- Species Carex prostrata All. accepted as Carex humilis var. humilis Leyss.
- Species Carex prostrata J.F.Gmel. accepted as Carex pilosa Scop.
- Species Carex protracta Steud. accepted as Carex laxiflora var. laxiflora Lam.
- Species Carex provincialis Degl. accepted as Carex echinata subsp. echinata Murray
- Species Carex psammogaea Steud. accepted as Carex melanocystis É.Desv.
- Species Carex psammophila Schur accepted as Carex brizoides L.
- Species Carex pseudoarenaria Pers. accepted as Carex disticha Huds.
- Species Carex pseudoarenaria Rchb. accepted as Carex pseudobrizoides Clavaud
- Species Carex pseudoarenicola Hayata accepted as Carex nubigena subsp. pseudoarenicola (Hayata) T.Koyama
- Species Carex pseudoatrata Meinsh. accepted as Carex caucasica subsp. caucasica Steven
- Species Carex pseudoaxillaris K.Richt.
- Species Carex pseudobiwensis Kitag. accepted as Carex rara subsp. rara Boott
- Species Carex pseudobuxbaumii M.Winkl. accepted as Carex buxbaumii Wahlenb.
- Species Carex pseudocilicica Hausskn. accepted as Carex atrata subsp. atrata L.
- Species Carex pseudoconica Franch. & Sav. accepted as Carex sachalinensis var. iwakiana Ohwi
- Species Carex pseudodoenitzii Akiyama accepted as Carex doenitzii Boeckeler
- Species Carex pseudoechinata Boeckeler accepted as Carex uruguensis Boeckeler
- Species Carex pseudofilicina Hayata accepted as Carex filicina Nees
- Species Carex pseudoflava Schur accepted as Carex distans subsp. distans L.
- Species Carex pseudofrigida C.B.Clarke accepted as Carex frigida All.
- Species Carex pseudofulva Fernald accepted as Carex leutzii Kneuck.
- Species Carex pseudoheleonastes Hand.-Mazz. accepted as Carex heleonastes subsp. heleonastes Ehrh. ex L.f.
- Species Carex pseudohirta Meinsh. accepted as Carex drymophila Turcz.
- Species Carex pseudohudsonii Podp. accepted as Carex prolixa Fr.
- Species Carex pseudojaponica C.B.Clarke accepted as Carex luzulifolia W.Boott
- Species Carex pseudojaponica Hayata accepted as Carex subtransversa C.B.Clarke
- Species Carex pseudolagopina T.J.Sørensen accepted as Carex marina subsp. pseudolagopina (T.J.Sørensen) Böcher
- Species Carex pseudolanceolata V.I.Krecz. accepted as Carex lanceolata var. subpediformis Kük.
- Species Carex pseudolongirostrata Y.L.Chang & Y.L.Yang accepted as Carex nodaeana A.I.Baranov & Skvortsov
- Species Carex pseudomacrogyna Kük.
- Species Carex pseudomairei E.G.Camus
- Species Carex pseudonutans Boreau ex Franch. accepted as Carex evoluta Hartm.
- Species Carex pseudonutans Boreau ex E.Martin accepted as Carex evoluta Hartm.
- Species Carex pseudoparadoxa S.Gibson accepted as Carex diandra Schrank
- Species Carex pseudopraecox Schur accepted as Carex praecox Schreb.
- Species Carex pseudopunctata Boeckeler accepted as Carex fuscula d'Urv.
- Species Carex pseudorivulorum Kük. accepted as Carex perakensis var. borneensis (C.B.Clarke) Noot.
- Species Carex pseudosabynensis (T.V.Egorova) A.E.Kozhevn. accepted as Carex umbrosa subsp. pseudosabynensis T.V.Egorova
- Species Carex pseudosabynensis (T.V.Egorova) T.V.Egorova accepted as Carex umbrosa subsp. pseudosabynensis T.V.Egorova
- Species Carex pseudoscirpoidea Rydb. accepted as Carex scirpoidea var. pseudoscirpoidea (Rydb.) Cronquist
- Species Carex pseudosphaerogyna Nelmes accepted as Carex congolensis Turrill
- Species Carex pseudostrigosa H.Lév. & Vaniot accepted as Carex alterniflora var. alterniflora Franch.
- Species Carex pseudothunbergii Akiyama accepted as Carex appendiculata (Trautv. & C.A.Mey.) Kük.
- Species Carex pseudoturfosa Dalla Torre & Sarnth. accepted as Carex turfosa Fr.
- Species Carex pseudoturfosa H.Lév. & L.C.Lamb. accepted as Carex turfosa Fr.
- Species Carex pseudovesicaria H.Lév. & Vaniot accepted as Carex idzuroei Franch. & Sav.
- Species Carex pseudovulpina K.Richt.
- Species Carex pseudowrightii Honda accepted as Carex vanheurckii subsp. vanheurckii Müll.Arg.
- Species Carex psilocarpa Steud. accepted as Carex spilocarpa Steud.
- Species Carex psilochloa Wall.
- Species Carex psilostachya Kit. ex Willd. accepted as Carex sylvatica subsp. sylvatica Huds.
- Species Carex psilostachys Steud. accepted as Carex excelsa Poepp. ex Kunth
- Species Carex psychroluta V.I.Krecz. accepted as Carex maritima Gunnerus
- Species Carex psyllophora L.f. accepted as Carex pulicaris L.
- Species Carex pterolepta Franch. accepted as Carex fluviatilis Boott
- Species Carex pteroloma Kunze ex Steud. accepted as Carex gibba Wahlenb.
- Species Carex pterygocarpa Steud. accepted as Carex banksii var. banksii Boott
- Species Carex ptychocarpa Steud. accepted as Carex abscondita Mack.
- Species Carex ptychocarpa Link accepted as Carex halleriana Asso
- Species Carex puberula Boott accepted as Carex leucochlora var. gracillima (Akiyama) Katsuy.
- Species Carex pubescens Muhl. ex Schkuhr accepted as Carex pubescens Muhl. ex Willd.
- Species Carex pubescens Muhl. ex Willd. accepted as Carex hirtifolia Mack.
- Species Carex pubescens Gilib. accepted as Carex montana L.
- Species Carex pubescens Poir. accepted as Fuirena pubescens (Poir.) Kunth
- Species Carex pubicarpa (Rohlena) A.W.Hill accepted as Carex flacca subsp. flacca Schreb.
- Species Carex pulchella F.Nyl. ex Trevir. accepted as Carex acuta L.
- Species Carex pulchella Berggr. accepted as Carex comans Berggr.
- Species Carex pulchella Holm accepted as Carex nudata W.Boott
- Species Carex pulchella (Lönnr.) Lindm. accepted as Carex oederi var. oederi Retz.
- Species Carex pulicarioides Ramond ex DC. accepted as Carex pyrenaica subsp. pyrenaica Wahlenb.
- Species Carex pulla Sol. ex Boott accepted as Carex flagellifera Colenso
- Species Carex pulla Gooden. accepted as Carex saxatilis L.
- Species Carex pullei Nelmes accepted as Carex turrita var. merrillii (Kük.) Noot.
- Species Carex pullulans Dulac accepted as Carex pilulifera subsp. pilulifera L.
- Species Carex pumila Honck. accepted as Carex montana L.
- Species Carex punctata Nees accepted as Carex notha Kunth
- Species Carex punctulata Leers accepted as Carex paniculata subsp. paniculata L.
- Species Carex punctulata R.Lesson ex A.Rich. accepted as Carex pseudocyperus var. pseudocyperus L.
- Species Carex pungens Boeckeler
- Species Carex purpurascens Kük. accepted as Carex alliiformis C.B.Clarke
- Species Carex purpurea Boott accepted as Carex acutata Boott
- Species Carex purpureotincta Ohwi accepted as Carex retrofracta subsp. retrofracta Kük.
- Species Carex purshii Olney accepted as Carex lurida Wahlenb.
- Species Carex pusilla Pers. accepted as Carex bicolor Bellardi ex All.
- Species Carex pusilla Arv.-Touv. accepted as Carex ornithopoda subsp. ornithopodioides (Hausm.) Nyman
- Species Carex pusteriana (Kalela) Landolt accepted as Carex norvegica subsp. pusteriana (Kalela) Ã.Löve & D.Löve
- Species Carex putjatini Kom.
- Species Carex putjatini Komarov accepted as Carex putjatini Kom.
- Species Carex putuoensis S.Yun Liang accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex pycnostachya Desv. accepted as Carex pleioneura G.A.Wheeler
- Species Carex pycnothyrsos Kük. accepted as Carex rafflesiana Boott
- Species Carex pyrenaica F.Muell. accepted as Carex acicularis Boott
- Species Carex pyriformis F.W.Schultz accepted as Carex aurea Nutt.
- Species Carex pyriformis Tausch ex F.W.Schultz accepted as Carex lepidocarpa subsp. lepidocarpa
- Species Carex pyrophila Gand. accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex qimenensis S.W.Su & S.M.Xu accepted as Carex dolichostachya subsp. dolichostachya Hayata
- Species Carex qingdaoensis F.Z.Li & S.J.Fan accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex quadrangulata Colenso accepted as Carex dissita Sol. ex Boott
- Species Carex quadrifida L.H.Bailey accepted as Carex heteroneura var. heteroneura S.Watson
- Species Carex qualicumensis L.H.Bailey accepted as Carex lyngbyei Hornem.
- Species Carex quasivaginata C.B.Clarke accepted as Carex vaginata var. vaginata Tausch
- Species Carex quaternaria Spreng. accepted as Carex loliacea L.
- Species Carex quebecensis Lepage
- Species Carex quinata J.F.Gmel. accepted as Carex cespitosa L.
- Species Carex quinata Raeusch. accepted as Carex cespitosa L.
- Species Carex quirponensis Fernald
- Species Carex racemosa Borkh. accepted as Carex paniculata subsp. paniculata L.
- Species Carex rachillis Maguire accepted as Carex subnigricans Stacey
- Species Carex raciborskii Zapał.
- Species Carex raeana Boott accepted as Carex vesicaria L.
- Species Carex rahmeri Phil. accepted as Carex decidua Boott
- Species Carex rahuiensis Kurtz ex V.I.Krecz. accepted as Carex capitata Sol.
- Species Carex ramondiana DC. accepted as Carex pyrenaica subsp. pyrenaica Wahlenb.
- Species Carex ramosa Schkuhr accepted as Carex ramosa Schkuhr. ex Willd.
- Species Carex ramosa Eckl. ex Kunth accepted as Carex lancea (Thunb.) Baill.
- Species Carex ramosipes Cherm. accepted as Carex mildbraediana Kük.
- Species Carex rankanensis Hayata accepted as Carex dolichostachya subsp. dolichostachya Hayata
- Species Carex raymondii Calder accepted as Carex atratiformis Britton
- Species Carex rechingeri Palla accepted as Carex graeffeana Boeckeler
- Species Carex reclinata Facchini accepted as Carex ornithopoda subsp. ornithopodioides (Hausm.) Nyman
- Species Carex recticulmis Franch. accepted as Carex sabynensis var. sabynensis Less. ex Kunth
- Species Carex rectior Mack. accepted as Carex granularis Muhl. ex Willd.
- Species Carex recurva Willd. ex Kunth accepted as Carex acuta L.
- Species Carex recurva Muhl. accepted as Carex cherokeensis Schwein.
- Species Carex recurva Huds. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex recurva Schkuhr accepted as Carex pseudocyperus var. pseudocyperus L.
- Species Carex recurvirostra Kunze accepted as Carex baccans Nees
- Species Carex recurvirostra Haller f. ex Steud. accepted as Carex davalliana Sm.
- Species Carex recurvisaccus T.Koyama accepted as Carex olivacea subsp. recurvisaccus (T.Koyama) T.Koyama
- Species Carex redowskiana C.A.Mey. accepted as Carex parallela subsp. redowskiana (C.A.Mey.) T.V.Egorova
- Species Carex reducta Drejer
- Species Carex reflexa Hoppe accepted as Carex caryophyllea Latourr.
- Species Carex reflexa Gaudin accepted as Carex davalliana Sm.
- Species Carex reflexa F.Dietr. accepted as Carex vulpina L.
- Species Carex reflexistyla Hayata accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex refracta Willd. accepted as Carex austroalpina Bech.
- Species Carex refracta Roth accepted as Carex caryophyllea Latourr.
- Species Carex regelii C.B.Clarke ex O.Fedtsch. accepted as Carex melanantha C.A.Mey.
- Species Carex reicheana Boeckeler accepted as Carex trichodes Steud.
- Species Carex reichenbachiana H.Lév. & Vaniot accepted as Carex pseudobrizoides Clavaud
- Species Carex reichenbachii Bonnet accepted as Carex pseudobrizoides Clavaud
- Species Carex reichenbachii Kük. accepted as Carex pseudobrizoides Clavaud
- Species Carex reichgeltii Jac.Koopman, Wieclaw & Waltje
- Species Carex rekohu Petrie accepted as Carex trifida Cav.
- Species Carex remotiflora Hayata accepted as Carex finitima Boott
- Species Carex remotiformis Kom. accepted as Carex remotiuscula Wahlenb.
- Species Carex remotispicula Hayata accepted as Carex rochebrunei subsp. remotispicula (Hayata) T.Koyama
- Species Carex remotoides H.Lév. accepted as Carex pseudoaxillaris K.Richt.
- Species Carex remyi Boeckeler accepted as Carex meyenii Nees
- Species Carex reticulosa Peterm. accepted as Carex elata subsp. elata All.
- Species Carex retorta (Fr.) V.I.Krecz. accepted as Carex cespitosa L.
- Species Carex retrocurva Dewey accepted as Carex laxiculmis var. laxiculmis Schwein.
- Species Carex retrorsa Nees accepted as Carex cognata Kunth
- Species Carex retusa Degl. accepted as Carex hispida Willd. ex Schkuhr
- Species Carex retzii Nees accepted as Carex chinensis var. chinensis Retz.
- Species Carex reuteriana Boiss. & Reut. accepted as Carex umbrosa subsp. huetiana (Boiss.) Soó
- Species Carex reventa V.I.Krecz. accepted as Carex rhizina subsp. reventa (V.I.Krecz.) T.V.Egorova
- Species Carex reversa Gilib. accepted as Carex pseudocyperus var. pseudocyperus L.
- Species Carex reversa Spreng. accepted as Carex retrorsa Schwein.
- Species Carex rhaphidocarpa Kunth accepted as Carex raphidocarpa Nees
- Species Carex rhizantha J.F.Gmel. accepted as Carex halleriana Asso
- Species Carex rhizodes Blytt ex Boott accepted as Carex rhizina subsp. rhizina Blytt ex Lindblom
- Species Carex rhizomatosa Steud. accepted as Carex oligostachya Nees
- Species Carex rhomboidea Holm accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex rhynchocarpa Heuff. accepted as Carex brevicollis DC.
- Species Carex rhynchophysa Fisch., C.A.Mey. & Avé-Lall. accepted as Carex utriculata Boott
- Species Carex rhynchophysa Liebm. accepted as Carex albicans var. australis (L.H.Bailey) Rettig
- Species Carex rhynchosporoides Steud. accepted as Carex ramosa Schkuhr. ex Willd.
- Species Carex rhytidocarpa Nelmes accepted as Carex inversa R.Br.
- Species Carex riabushinskii Kom. accepted as Carex lyngbyei Hornem.
- Species Carex richardii Thuill. accepted as Carex canescens subsp. canescens L.
- Species Carex richardii Michx. accepted as Carex tribuloides var. tribuloides Wahlenb.
- Species Carex richii (Fernald) Mack. accepted as Carex straminea Willd. ex Schkuhr
- Species Carex richmondii Boott ex C.B.Clarke accepted as Carex tasmanica Kük.
- Species Carex rieseana Figert
- Species Carex rigens Thuill. accepted as Carex acutiformis Ehrh.
- Species Carex rigens Boott accepted as Carex nipposinica Ohwi
- Species Carex rigens L.H.Bailey accepted as Carex turbinata Liebm.
- Species Carex rigescens (Franch.) V.I.Krecz. accepted as Carex duriuscula subsp. rigescens (Franch.) S.Yun Liang & Y.C.Tang
- Species Carex rigida Clairv. ex Steud. accepted as Carex cespitosa L.
- Species Carex rigida Gooden. accepted as Carex dacica Heuff.
- Species Carex rigida Schrank accepted as Carex ferruginea Scop.
- Species Carex rigida Tuck. accepted as Carex stylosa C.A.Mey.
- Species Carex rigidifolia Hochst. ex Seub. accepted as Carex hochstetteriana J.Gay ex Seub.
- Species Carex riishirensis Franch. accepted as Carex scita var. riishirensis (Franch.) Kük.
- Species Carex rikucbiuensis Akiyama
- Species Carex ringgoldiana Boott accepted as Carex ischnostachya var. ischnostachya Steud.
- Species Carex riparia Geners. accepted as Carex acutiformis Ehrh.
- Species Carex riparia Moench ex Steud. accepted as Carex acuta L.
- Species Carex riparia Muhl. accepted as Carex lacustris Willd.
- Species Carex riparia (R.Br.) Poir. accepted as Carex umbricola K.L.Wilson
- Species Carex ripariaeformis Litv. accepted as Carex melanostachya M.Bieb. ex Willd.
- Species Carex rivalis Planellas accepted as Carex divisa Huds.
- Species Carex rivalis Willk. & Lange accepted as Carex divisa Huds.
- Species Carex rivularis Schkuhr accepted as Carex divisa Huds.
- Species Carex rivulorum Ridl. accepted as Carex perakensis var. borneensis (C.B.Clarke) Noot.
- Species Carex robinsonii Podlech accepted as Carex lycurus subsp. lycurus K.Schum.
- Species Carex roborowskii V.I.Krecz. accepted as Carex pseudofoetida subsp. pseudofoetida Kük.
- Species Carex robusta Hochst. ex Boeckeler accepted as Carex bequaertii subsp. bequaertii De Wild.
- Species Carex robusta F.Nyl. accepted as Carex utriculata Boott
- Species Carex rochebrunii accepted as Carex rochebrunei Franch. & Sav.
- Species Carex rodnensis (Porcius ex Asch. & Graebn.) Rouy accepted as Carex curvula subsp. curvula All.
- Species Carex rodriguesii Merino accepted as Carex binervis Sm.
- Species Carex rodriguezii Merino accepted as Carex binervis Sm.
- Species Carex rodriguezii C.Vicioso accepted as Carex mairei Coss. & Germ.
- Species Carex roemeriana Scheele accepted as Carex microdonta Torr.
- Species Carex rollandii Lepage accepted as Carex hibernica A.Benn.
- Species Carex romanzowiana Cham. ex Steud. accepted as Carex lyngbyei Hornem.
- Species Carex rosae (Gilomen) Holub accepted as Carex curvula subsp. rosae Gilomen
- Species Carex rosaeoides Howe accepted as Carex seorsa Howe
- Species Carex rossiana Degen
- Species Carex rostellata Gay ex Boott accepted as Carex notha Kunth
- Species Carex rostrata Muhl. ex Willd. accepted as Carex lurida Wahlenb.
- Species Carex rostrata Michx. accepted as Carex michauxiana Boeckeler
- Species Carex rostrata Hoppe ex Schkuhr accepted as Carex michelii Host
- Species Carex rotae De Not.
- Species Carex rotoensis Petrie
- Species Carex rousseaui Raymond accepted as Carex haydenii Dewey
- Species Carex royleana Nees accepted as Carex leucochlora var. leucochlora Bunge
- Species Carex rubella Boott accepted as Carex spicigera Nees
- Species Carex rubescens Boeckeler accepted as Carex dimorpholepis Steud.
- Species Carex rubra H.Lév. & Vaniot accepted as Carex cespitosa L.
- Species Carex rudis Wimm. accepted as Carex acuta L.
- Species Carex ruedtii Kneuck.
- Species Carex ruesanensis Kudô accepted as Carex rotundata Wahlenb.
- Species Carex rufa Schrank accepted as Carex acutiformis Ehrh.
- Species Carex rufa (Nees) Baill. accepted as Carex ludwigii (Hochst.) Luceño & Martín-Bravo
- Species Carex rufa Lam. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex ruffa Brot. accepted as Carex riparia Curtis
- Species Carex rufidula Steud. accepted as Carex glaucescens Elliott
- Species Carex rufovariegata Boeckeler accepted as Carex petasata Dewey
- Species Carex rugata Fernald accepted as Carex corrugata Fernald
- Species Carex rugeliana Kunze accepted as Carex misera Buckley
- Species Carex rugosperma Mack. accepted as Carex tonsa var. rugosperma (Mack.) Crins
- Species Carex ruidana Boeckeler accepted as Carex pichinchensis Kunth
- Species Carex ruiziana Boeckeler accepted as Carex pichinchensis Kunth
- Species Carex ruizianus Boeckeler accepted as Cyperus hermaphroditus (Jacq.) Standl.
- Species Carex rupestris Turcz. ex Trevir. accepted as Carex argunensis Turcz. ex Trevir.
- Species Carex rusbyi Mack. accepted as Carex vallicola Dewey
- Species Carex ruthenica V.I.Krecz. accepted as Carex caryophyllea Latourr.
- Species Carex rutilus Humn.
- Species Carex saamica A.T.M.Pedersen & Elven
- Species Carex sabauda Beauverd accepted as Carex winkelmannii Asch. & Graebn.
- Species Carex sabuletorum M.Bieb. ex Boott accepted as Carex arenaria L.
- Species Carex sachapata Steud. accepted as Carex fuscoatra Boecheler
- Species Carex sadae H.Lév. & Vaniot accepted as Carex blepharicarpa Franch.
- Species Carex sadleri E.F.Linton accepted as Carex binervis Sm.
- Species Carex sagittifera Lowe accepted as Carex peregrina Link
- Species Carex sakaguchii Ohwi
- Species Carex sakonis T.Koyama accepted as Carex wahuensis subsp. sakonis (T.Koyama) X.F.Jin
- Species Carex salina Bong. ex Trevir. accepted as Carex canescens subsp. canescens L.
- Species Carex salina Boott accepted as Carex lyngbyei Hornem.
- Species Carex saliniformis Mack. accepted as Carex hassei L.H.Bailey
- Species Carex salinoides Beurl. accepted as Carex salina var. salina Wahlenb.
- Species Carex salisiana Brügger
- Species Carex saltuensis L.H.Bailey accepted as Carex vaginata var. vaginata Tausch
- Species Carex samoensis Boeckeler accepted as Carex maculata Boott
- Species Carex sandwicensis Boeckeler accepted as Carex alligata Boott
- Species Carex sangamonensis (Clokey) Mohlenbr. accepted as Carex tribuloides var. sangamonensis Clokey
- Species Carex sanionis K.Richt.
- Species Carex sarda Link accepted as Carex distachya var. distachya Desf.
- Species Carex sardloqensis E.Dahl
- Species Carex sareptana V.I.Krecz. accepted as Carex acuta L.
- Species Carex sarntheinii J.Vetter accepted as Carex candriani Kneuck.
- Species Carex saruensis Franch. accepted as Carex miyabei var. miyabei Franch.
- Species Carex sasakii Hayata accepted as Carex alopecuroides D.Don ex Tilloch & Taylor
- Species Carex saskatschawana Boeckeler accepted as Carex saskatschewana Boeckeler
- Species Carex saskatschewana Boeckeler accepted as Carex capillaris subsp. capillaris L.
- Species Carex saturata C.B.Clarke accepted as Carex filicina Nees
- Species Carex savatieri Franch. accepted as Carex curvicollis Franch. & Sav.
- Species Carex saxatilis Huds. accepted as Carex caryophyllea Latourr.
- Species Carex saxenii Raymond
- Species Carex saxumbra F.Lees accepted as Carex pilulifera subsp. pilulifera L.
- Species Carex scaberima C.B.Clarke accepted as Carex rafflesiana Boott
- Species Carex scaberrima Scheele
- Species Carex scaberrima (Boeckeler) C.B.Clarke accepted as Carex rafflesiana Boott
- Species Carex scabra Hoppe accepted as Carex davalliana Sm.
- Species Carex scabriculmis (Kük.) Ohwi accepted as Carex teinogyna Boott
- Species Carex scabricuspis V.I.Krecz. accepted as Carex caryophyllea Latourr.
- Species Carex scabrinervia Franch. accepted as Carex scita var. scabrinervia (Franch.) Kük.
- Species Carex scabrior Sartwell ex Boott accepted as Carex vulpinoidea Michx.
- Species Carex scabrior Sartwell ex Dewey accepted as Carex vulpinoidea Michx.
- Species Carex scabroaristata Akiyama accepted as Carex alterniflora var. alterniflora Franch.
- Species Carex scandinavica E.W.Davies accepted as Carex oederi var. oederi Retz.
- Species Carex scariosa Lam. accepted as Carex humilis var. humilis Leyss.
- Species Carex schaffneri Boeckeler accepted as Abildgaardia mexicana (Palla) Kral
- Species Carex schaffneri W.Boott ex S.Watson accepted as Carex potosina Hemsl.
- Species Carex schalkertii Murr
- Species Carex schatzii Kneuck.
- Species Carex schedonautos Steud. accepted as Carex gayana Desv.
- Species Carex schenckiana Boeckeler accepted as Carex phalaroides Kunth
- Species Carex schenodautos Steud. accepted as Carex gayana Desv.
- Species Carex scheuchzeri J.F.Gmel. accepted as Carex acutiformis Ehrh.
- Species Carex scheuchzeri Gaudin accepted as Carex brachystachys Schrank
- Species Carex scheuchzeri Gaud. ex Boott accepted as Carex brachystachys Schrank
- Species Carex schistorhyncha H.Lév. & Vaniot accepted as Carex simulans C.B.Clarke
- Species Carex schkuhriana H.Lév. & Vaniot accepted as Carex dimorpholepis Steud.
- Species Carex schkuhrii Willd. accepted as Carex liparocarpos subsp. bordzilowskii (V.I.Krecz.) T.V.Egorova
- Species Carex schlagintweitiana Boeckeler accepted as Carex setigera var. schlagintweitiana (Boeckeler) Kük.
- Species Carex schlechteri Nelmes accepted as Carex glomerata Thunb.
- Species Carex schmidtiana Junge accepted as Carex justi-schmidtii Junge
- Species Carex schmidtii Boeckeler accepted as Carex stenantha var. stenantha Franch. & Sav.
- Species Carex schoenoides Schrank accepted as Carex colchica J.Gay
- Species Carex schoenoides DC. accepted as Carex disticha Huds.
- Species Carex schoenoides Desf. accepted as Carex divisa Huds.
- Species Carex schoenoides Thuill. accepted as Carex divisa Huds.
- Species Carex schottii Boiss. accepted as Carex tristis M.Bieb.
- Species Carex schraderi Willd. accepted as Carex laevigata Sm.
- Species Carex schreberi Desv. accepted as Carex arenaria L.
- Species Carex schreberi Ten. ex Boott accepted as Carex divisa Huds.
- Species Carex schreberi Willd. accepted as Carex praecox Schreb.
- Species Carex schreberi Schrank accepted as Carex praecox Schreb.
- Species Carex schrenkiana C.A.Mey. ex Trevir. accepted as Carex vesicaria L.
- Species Carex schuetzeana Figert
- Species Carex schummelii Siegert accepted as Carex acuta L.
- Species Carex schwackeana Boeckeler accepted as Carex purpureovaginata Boeckeler
- Species Carex schweinitzia Eaton accepted as Carex schweinitzii Dewey ex Schwein.
- Species Carex scirpiformis Mack. accepted as Carex scirpoidea var. scirpoidea Michx.
- Species Carex scirpina (Willd.) Missbach & E.H.L.Krause accepted as Carex myosuroides Vill.
- Species Carex scirpina Tuck. ex Boott accepted as Carex scirpoidea var. scirpoidea Michx.
- Species Carex scirpina Tuck. accepted as Carex scirpoidea Michx.
- Species Carex scirpoides Schkuhr ex Willd. accepted as Carex interior L.H.Bailey
- Species Carex scirpoides Sartwell accepted as Carex scirpoidea var. scirpoidea Michx.
- Species Carex scirrobasis Kitag. accepted as Carex humilis var. scirrobasis (Kitag.) Y.L.Chang & Y.L.Yang
- Species Carex sclerioides Ridl. accepted as Carex filicina Nees
- Species Carex scoparia Torr. accepted as Carex muskingumensis Schwein.
- Species Carex scopoliana Willd. accepted as Carex ferruginea Scop.
- Species Carex scopolii Gaudin accepted as Carex ferruginea Scop.
- Species Carex scordiae Lojac.
- Species Carex scotica Spreng. accepted as Carex vaginata var. vaginata Tausch
- Species Carex scouleri Torr. accepted as Carex lyngbyei Hornem.
- Species Carex seatoniana L.H.Bailey accepted as Carex spissa var. seatoniana (L.H.Bailey) Kük.
- Species Carex secale Wahlenb. ex Trevir. accepted as Carex hordeistichos Vill.
- Species Carex secalina Lapeyr. accepted as Carex riparia Curtis
- Species Carex seditiosa Steud. accepted as Carex fecunda Steud.
- Species Carex seiskoensis Freyn accepted as Carex tenuiformis var. tenuiformis H.Lév. & Vaniot
- Species Carex sekimotoi Honda accepted as Carex papulosa Boott
- Species Carex selengensis N.A.Ivanova accepted as Carex karoi Freyn
- Species Carex semicrinita C.B.Clarke accepted as Carex stricta Lam.
- Species Carex semicylindrica Kit.
- Species Carex semiforsteri C.B.Clarke accepted as Carex forsteri Wahlenb.
- Species Carex semiforsteri C.B.Clarke ex Cheeseman accepted as Carex forsteri Wahlenb.
- Species Carex semi-forsteri C.B.Clarke ex Cheeseman accepted as Carex forsteri Wahlenb.
- Species Carex semiglomerata Kük. accepted as Carex rafflesiana Boott
- Species Carex semiplena Kük. accepted as Carex middendorffii var. kirigaminensis (Ohwi) Ohwi
- Species Carex sempervirens Schwein. accepted as Carex glaucescens Elliott
- Species Carex sempervirens Elliott ex Kunth accepted as Carex stricta Lam.
- Species Carex senayana Soó
- Species Carex sendtneriana Brügger
- Species Carex sennenii (Pau ex Sennen) Sennen accepted as Carex riparia Curtis
- Species Carex sepulta Phil. accepted as Carex pumila Thunb.
- Species Carex serotina Ten. accepted as Carex muricata subsp. muricata L.
- Species Carex serotina Mérat accepted as Carex oederi var. oederi Retz.
- Species Carex serranoi Phil. accepted as Carex darwinii var. serranoi (Phil.) Kük.
- Species Carex serravalensis Beauverd
- Species Carex serrulata Mutel accepted as Carex echinata subsp. echinata Murray
- Species Carex serrulata Biv. accepted as Carex flacca subsp. erythrostachys (Hoppe) Holub
- Species Carex serrulata Biv. ex Spreng. accepted as Carex flacca subsp. erythrostachys (Hoppe) Holub
- Species Carex setacea Froel. ex Kunth accepted as Carex mucronata All.
- Species Carex setacea Frank ex Kunth accepted as Carex stipata var. stipata Muhl. ex Willd.
- Species Carex setacea Dewey accepted as Carex vulpinoidea Michx.
- Species Carex setariiformis Turcz. ex Boott accepted as Carex leiorhyncha C.A.Mey.
- Species Carex setifolia Heer accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex setifolia Godr. accepted as Carex divisa Huds.
- Species Carex setifolia (Dewey) Britton & A.Br. accepted as Carex eburnea Boott
- Species Carex setina (Christ) V.I.Krecz. accepted as Carex maritima Gunnerus
- Species Carex setispica C.B.Clarke accepted as Carex moesta Kunth
- Species Carex setosa Franch. & Sav. accepted as Carex caryophyllea Latourr.
- Species Carex setulifolia Nelmes accepted as Carex perakensis var. perakensis C.B.Clarke
- Species Carex sewellii A.Benn. & C.B.Clarke accepted as Carex lachenalii subsp. lachenalii Schkuhr
- Species Carex sexspicata Colenso accepted as Carex forsteri Wahlenb.
- Species Carex shakushizawaensis Akiyama
- Species Carex shanghaiensis S.X.Qian & Y.Q.Liu accepted as Carex blinii H.Lév. & Vaniot
- Species Carex sharensis Franch. accepted as Carex augustinowiczii var. sharensis (Franch.) Ohwi
- Species Carex sharensis Akiyama accepted as Carex musashiensis Ohwi
- Species Carex sharyotensis Hayata accepted as Carex oxyphylla Franch.
- Species Carex shichiseitensis Hayata accepted as Carex phacota Spreng.
- Species Carex shikokiana Makino accepted as Carex mahinoensis Franch.
- Species Carex shimadai Hayata accepted as Carex mahinoensis Franch.
- Species Carex shimotsukensis Honda accepted as Carex formosensis H.Lév. & Vaniot
- Species Carex shinanoana Nakai ex Aliyama
- Species Carex shortii Steud. accepted as Carex frankii Kunth
- Species Carex shortii Torr. accepted as Carex shortiana Dewey & Torr.
- Species Carex shriveri (Britton) Britton accepted as Carex granularis Muhl. ex Willd.
- Species Carex sibirica Willd. ex Kunth accepted as Carex loliacea L.
- Species Carex siciformis Boott accepted as Carex crus-corvi Shuttlew. ex Kunze
- Species Carex sicula C.Presl accepted as Carex distans subsp. distans L.
- Species Carex sicula C.Presl ex Boott accepted as Carex distans subsp. distans L.
- Species Carex sicula Tineo accepted as Carex leporina L.
- Species Carex sicyocarpa Lebel accepted as Carex praecox Schreb.
- Species Carex sieberi Nees ex Kunth accepted as Cyperus aggregatus var. aggregatus (Willd.) Endl.
- Species Carex sieberiana Opiz accepted as Carex davalliana Sm.
- Species Carex sieboldii Miq. accepted as Carex maculata Boott
- Species Carex siegertiana R.Uechtr. accepted as Carex atherodes Spreng.
- Species Carex siegertiana Uechtritz ex Garcke accepted as Carex atherodes Spreng.
- Species Carex sikkimensis C.B.Clarke accepted as Carex fucata Boott ex C.B.Clarke
- Species Carex silesiaca Figert accepted as Carex ludibunda J.Gay
- Species Carex silvatica Huds. accepted as Carex sylvatica Huds.
- Species Carex similigena V.I.Krecz. accepted as Carex enervis C.A.Mey.
- Species Carex similis d'Urv. accepted as Carex canescens var. robustior Blytt ex Andersson
- Species Carex simplicissima F.Muell. accepted as Carex capillacea var. capillacea Boott
- Species Carex sinai Boott accepted as Carex distans subsp. distans L.
- Species Carex sinaica Nees ex Steud. accepted as Carex distans subsp. distans L.
- Species Carex sinensis J.F.Gmel. accepted as Carex chinensis var. chinensis Retz.
- Species Carex sinocrispa Raymond accepted as Carex lingii F.T.Wang & Tang
- Species Carex sinomairei H.Lév. accepted as Carex fedia Nees
- Species Carex sismanii Velen. accepted as Carex punctata Gaudin
- Species Carex sisukensis Akiyama accepted as Carex atrofusca subsp. atrofusca Schkuhr
- Species Carex sitchensis J.D.Prescott ex Bong. accepted as Carex aquatilis var. dives (Holm) Kük.
- Species Carex sitchensis J.D.Prescott accepted as Carex aquatilis var. dives (Holm) Kük.
- Species Carex skottsbergii Gand. accepted as Carex canescens var. robustior Blytt ex Andersson
- Species Carex slobodovii V.I.Krecz. accepted as Carex pseudofoetida subsp. pseudofoetida Kük.
- Species Carex smalliana Mack. accepted as Carex lonchocarpa Willd. ex Spreng.
- Species Carex smaragdina Colenso accepted as Carex inversa R.Br.
- Species Carex smirnoviana Melnikov accepted as Carex borealipolaris S.R.Zhang
- Species Carex smirnovii V.I.Krecz. accepted as Carex rugulosa Kük.
- Species Carex smithii Tausch accepted as Carex vaginata var. vaginata Tausch
- Species Carex smitinandii Raymond accepted as Carex commixta Steud.
- Species Carex socia Boott accepted as Carex arnottiana Nees ex Drejer
- Species Carex soczavaeana Gorodkov accepted as Carex bigelowii subsp. lugens (Holm) T.V.Egorova
- Species Carex soerensenii Lepage
- Species Carex sohachii Ohwi accepted as Carex duriuscula subsp. duriuscula C.A.Mey.
- Species Carex soleirolii DC. & Duby accepted as Carex hispida Willd. ex Schkuhr
- Species Carex solstitialis Figert accepted as Carex rotae De Not.
- Species Carex sonderiana Boott ex C.B.Clarke accepted as Carex purpureovaginata Boeckeler
- Species Carex sonderiana Boott ex Lindm. accepted as Carex purpureovaginata Boeckeler
- Species Carex songarica Schrenk
- Species Carex sonomensis Stacey accepted as Carex lemmonii W.Boott
- Species Carex sooi Jakucs
- Species Carex soperi Raup accepted as Carex macloviana var. macloviana d'Urv.
- Species Carex sorachensis H.Lév. & Vaniot accepted as Carex shimidzensis Franch.
- Species Carex sordida Heurck & Muell.Arg. accepted as Carex sordida Van Heurck & Müll.Arg.
- Species Carex soriofkensis H.Lév. & Vaniot accepted as Carex mackenziei V.I.Krecz.
- Species Carex soriofkensis Levl. & Vant. accepted as Carex glareosa Schkuhr ex Wahlenb.
- Species Carex sororia Meinsh. accepted as Carex cespitosa L.
- Species Carex souliei Franch. accepted as Carex obscura var. brachycarpa C.B.Clarke
- Species Carex soyaeensis Kük. accepted as Carex augustinowiczii var. augustinowiczii Meinsh.
- Species Carex sozusensis Ohwi accepted as Carex appendiculata (Trautv. & C.A.Mey.) Kük.
- Species Carex spadicea Roth accepted as Carex acutiformis Ehrh.
- Species Carex spadicea Gilib. accepted as Carex arenaria L.
- Species Carex spadicea Host accepted as Carex ferruginea Scop.
- Species Carex spadicea J.F.Gmel. accepted as Carex ferruginea Scop.
- Species Carex spadicea Schkuhr accepted as Carex frigida All.
- Species Carex spadiceovaginata Ohwi accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex spaniocarpa Steud. accepted as Carex supina var. spaniocarpa (Steud.) B.Boivin
- Species Carex sparganioides Leconte ex Kunth accepted as Carex stipata var. stipata Muhl. ex Willd.
- Species Carex sparsiflora (Wahlenb.) Steud. accepted as Carex vaginata var. vaginata Tausch
- Species Carex sparsinux C.B.Clarke ex Franch. accepted as Carex filipes var. filipes Franch. & Sav.
- Species Carex spartea Thunb. accepted as Carex spartea Wahlenb.
- Species Carex spathaceobracteata Kük. accepted as Carex bilateralis Hayata
- Species Carex spathulata (Kük.) Nelmes accepted as Carex teres Boott
- Species Carex spatiosa Boott accepted as Carex commixta Steud.
- Species Carex speirostachya Sw. ex Sm. accepted as Carex hostiana DC.
- Species Carex sphacelata Holm accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex sphaerica Lapeyr. accepted as Carex frigida All.
- Species Carex sphaerocarpa Willd. accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex sphaerocarpa Ehrh. accepted as Carex tomentosa L.
- Species Carex sphaerostachya (Tuck.) Dewey accepted as Carex brunnescens subsp. sphaerostachya (Tuck.) Kalela
- Species Carex spicata Lam. accepted as Carex disticha Huds.
- Species Carex spicata Brot. ex Kunth accepted as Carex divisa Huds.
- Species Carex spicata Schkuhr accepted as Carex obtusata Lilj.
- Species Carex spicata Thuill. accepted as Carex vulpina L.
- Species Carex spiculata Boott accepted as Carex myosurus Nees
- Species Carex spiculosa Fr.
- Species Carex spiralis Ewing accepted as Carex bigelowii subsp. bigelowii Torr. ex Schwein.
- Species Carex splendens Thuill. ex Pers. accepted as Carex divisa Huds.
- Species Carex splendida Willd. accepted as Carex lasiocarpa var. lasiocarpa Ehrh.
- Species Carex spongiifolia A.E.Kozhevn. accepted as Carex appendiculata (Trautv. & C.A.Mey.) Kük.
- Species Carex spongiosa Ohwi accepted as Carex arenicola F.Schmidt
- Species Carex spongocrepis Nelmes accepted as Carex cruciata Wahlenb.
- Species Carex spongoneura Nelmes accepted as Carex rafflesiana Boott
- Species Carex sprengelii Boeckeler accepted as Carex spartea Wahlenb.
- Species Carex spreta L.H.Bailey accepted as Carex aperta Boott
- Species Carex spreta Steud. accepted as Carex cespitosa L.
- Species Carex squamata V.I.Krecz. accepted as Carex alta Boott
- Species Carex squamigera V.I.Krecz. & Luchnik
- Species Carex squamigera V.I.Krecz. & Luczn. accepted as Carex squamigera V.I.Krecz. & Luchnik
- Species Carex squamoidea Akiyama accepted as Carex microtricha Franch.
- Species Carex stachydesma Franch. accepted as Carex rubrobrunnea var. rubrobrunnea C.B.Clarke
- Species Carex stagnalis L.C.Lamb. accepted as Carex prolixa Fr.
- Species Carex staintonii X.F.Jin, H.Ikeda & Okih.Yano accepted as Carex setigera var. staintonii (X.F.Jin, H.Ikeda & Okih.Yano) Rajbh. & R.Chhetri
- Species Carex standleyi Steyerm. accepted as Carex standleyana Steyerm.
- Species Carex stans Drejer accepted as Carex aquatilis var. minor Boott
- Species Carex stansalina Lepage accepted as Carex halophila var. stansalina (Lepage) ined.
- Species Carex stantonensis M.E.Jones accepted as Carex nardina var. hepburnii (Boott) Kük.
- Species Carex steenstrupii Liebm. accepted as Carex lyngbyei Hornem.
- Species Carex stellata Mack. accepted as Carex schiedeana Kunze
- Species Carex stellulata Gooden. accepted as Carex echinata subsp. echinata Murray
- Species Carex stellulata M.Bieb. accepted as Carex muricata subsp. muricata L.
- Species Carex stenandra Kük. accepted as Carex hirtigluma var. hirtigluma C.B.Clarke
- Species Carex stenantha C.B.Clarke accepted as Carex bostrychostigma Maxim.
- Species Carex stenochlaena (Holm) Mack. accepted as Carex scirpoidea var. stenochlaena Holm
- Species Carex stenolepis Torr. accepted as Carex frankii Kunth
- Species Carex stenolepis Less. accepted as Carex rostrata var. rostrata Stokes
- Species Carex stenolepis Less. ex Steud. accepted as Carex rostrata var. rostrata Stokes
- Species Carex stenophylla L.Thienem. ex Boott accepted as Carex maritima Gunnerus
- Species Carex stenophylloides V.I.Krecz. accepted as Carex stenophylla subsp. stenophylloides (V.I.Krecz.) T.V.Egorova
- Species Carex stenoptera Mack. accepted as Carex subfusca W.Boott
- Species Carex stenura Nelmes accepted as Carex speciosa subsp. speciosa Kunth
- Species Carex steudelii Kunth accepted as Carex jamesii Schwein.
- Species Carex stichensis J.D.Prescott accepted as Carex sitchensis J.D.Prescott
- Species Carex stictocarpa Sm. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex stilbophaea V.I.Krecz. accepted as Carex atrofusca subsp. atrofusca Schkuhr
- Species Carex stipitata Boeckeler accepted as Carex stipata var. stipata Muhl. ex Willd.
- Species Carex stolonifera Hoppe accepted as Carex nigra subsp. alpina (Gaudin) Lemke
- Species Carex stolonifera H.Lév. & Vaniot accepted as Carex oxyandra var. oxyandra (Franch. & Sav.) Kudô
- Species Carex stolonifera Ehrh. accepted as Carex praecox Schreb.
- Species Carex stramintita Boott ex Boeck. accepted as Carex stramentitia Boott ex Boeckeler
- Species Carex striata R.Br. accepted as Carex brownii Tuck.
- Species Carex striata Torr. ex Boott accepted as Carex polymorpha Muhl.
- Species Carex striata Gilib. accepted as Carex riparia Curtis
- Species Carex stricta Gooden. accepted as Carex elata subsp. elata All.
- Species Carex stricticulmis Holmb.
- Species Carex strictifolia Rchb. accepted as Carex acuta L.
- Species Carex strictifolia Opiz ex Nyman accepted as Carex acuta L.
- Species Carex strictiformis Almq.
- Species Carex strictiformis Mack. accepted as Carex endlichii Kük.
- Species Carex strictior Dewey ex Alph.Wood accepted as Carex stricta Lam.
- Species Carex strigosa All. accepted as Carex brachystachys Schrank
- Species Carex strigosa Suter ex Boott accepted as Carex firma Mygind ex Host
- Species Carex strigosa Willd. ex Kunth accepted as Carex sylvatica subsp. sylvatica Huds.
- Species Carex strigosula Chatenier
- Species Carex stupenda H.Lév. & Vaniot accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex subalpina Brügger accepted as Carex magellanica subsp. irrigua (Wahlenb.) Hiitonen
- Species Carex subanceps Boeckeler accepted as Carex dispalata subsp. dispalata Boott
- Species Carex subbiflora Steud. accepted as Carex pensylvanica Lam.
- Species Carex subcaespitosa (Kük.) Wiinst. accepted as Carex nigra subsp. nigra (L.) Reichard
- Species Carex subcompressa Steud. accepted as Carex prasina Wahlenb.
- Species Carex subconcolor Kitag. accepted as Carex arnellii Christ ex Scheutz
- Species Carex subcostata Holmb.
- Species Carex subdissitiflora Kük. accepted as Carex dissitiflora subsp. dissitiflora Franch.
- Species Carex subdita Ohwi accepted as Carex insaniae var. subdita (Ohwi) Ohwi
- Species Carex subebracteata (Kük.) Ohwi accepted as Carex sabynensis var. rostrata (Maxim.) Ohwi
- Species Carex suberea Boott accepted as Carex scabrifolia Steud.
- Species Carex subfilicina Ohwi accepted as Carex filicina Nees
- Species Carex subglobosa Miel. accepted as Carex oederi var. oederi Retz.
- Species Carex subgracilis Druce accepted as Carex auroniensis L.C.Lamb.
- Species Carex subholarctica (T.V.Egorova) Melnikov accepted as Carex simpliciuscula subsp. subholarctica (T.V.Egorova) Saarela
- Species Carex subimpressa Clokey
- Species Carex sublateralis T.Koyama accepted as Carex blinii H.Lév. & Vaniot
- Species Carex sublimosa Lepage accepted as Carex paleacea Schreb. ex Wahlenb.
- Species Carex sublivida Norrl. accepted as Carex panicea L.
- Species Carex subloliacea (Laest.) E.P.Bicknell accepted as Carex lapponica O.Lang
- Species Carex subnigra Lepage accepted as Carex vacillans Drejer
- Species Carex subnivalis Arv.-Touv. accepted as Carex ornithopoda subsp. ornithopodioides (Hausm.) Nyman
- Species Carex suborbiculata Mack. accepted as Carex nudata W.Boott
- Species Carex subpaleacea J.Cay.
- Species Carex subpatula Holmb.
- Species Carex subpediformis (Kük.) Sutô & Suzuki accepted as Carex lanceolata var. subpediformis Kük.
- Species Carex subphacota (Kük.) Nakai accepted as Carex phacota Spreng.
- Species Carex subramosa Willd. ex Kunth accepted as Carex divulsa Stokes
- Species Carex subrecta J.Cay.
- Species Carex subreducta Lepage
- Species Carex subremota Charit.
- Species Carex subrotunda M.Serres accepted as Carex elata subsp. elata All.
- Species Carex subsabulosa Norman accepted as Carex canescens subsp. canescens L.
- Species Carex subsalina Lepage accepted as Carex halophila var. halophila F.Nyl.
- Species Carex subsalsa Nyman accepted as Carex hostiana DC.
- Species Carex substans Lepage accepted as Carex flavicans var. substans (Lepage) ined.
- Species Carex substricta (Kük.) Mack. accepted as Carex aquatilis var. substricta Kük.
- Species Carex subteinogyna Ohwi accepted as Carex bilateralis Hayata
- Species Carex subulata Wahlenb. accepted as Carex boryana Schkuhr
- Species Carex subulata Schumach. accepted as Carex buxbaumii Wahlenb.
- Species Carex subulata Michx. accepted as Carex collinsii Nutt.
- Species Carex subulata J.F.Gmel. accepted as Scleria lithosperma var. lithosperma (L.) Sw.
- Species Carex subuniflora Steud. accepted as Carex oligocarpa Willd.
- Species Carex subvaginata Meinsh. ex C.B.Clarke accepted as Carex schmidtii Meinsh.
- Species Carex subvillosa M.Bieb. accepted as Carex tomentosa L.
- Species Carex subviridula Fernald
- Species Carex subvulpina Senay accepted as Carex otrubae Podp.
- Species Carex succedanea Nakai accepted as Carex paxii Kük.
- Species Carex sudetica Opiz accepted as Carex aterrima subsp. aterrima Hoppe
- Species Carex sudetica C.Presl ex Kunth accepted as Carex vaginata var. vaginata Tausch
- Species Carex suilla J.Fellm. accepted as Carex vesicaria L.
- Species Carex sukaczovii V.I.Krecz. accepted as Carex gotoi Ohwi
- Species Carex suksdorfii Kük. accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex sulcata Schur accepted as Carex melanostachya M.Bieb. ex Willd.
- Species Carex sumatrensis C.B.Clarke accepted as Carex verticillata Zoll. & Moritzi
- Species Carex sumikawaensis Fujiw. & Y.Matsuda
- Species Carex supergoodenoughii Lepage accepted as Carex vacillans Drejer
- Species Carex supermascula V.I.Krecz. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex superriparia Hübl accepted as Carex beckmanniana Figert
- Species Carex surculosa Raymond accepted as Carex tsiangii F.T.Wang & Tang
- Species Carex sutchanensis Kom. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex suteri Kunth accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex suziella Podp.
- Species Carex svenonis Skottsb. accepted as Carex echinata subsp. echinata Murray
- Species Carex sychnostachya Nelmes accepted as Carex juvenilis C.B.Clarke ex E.G.Camus
- Species Carex sylvatica Dewey accepted as Carex arctata Boott
- Species Carex sylvatica Maxim. ex Boeckeler accepted as Carex arnellii Christ ex Scheutz
- Species Carex sylvatica Maxim. accepted as Carex arnellii Christ ex Scheutz
- Species Carex sylvenii Holmb.
- Species Carex sylvicola J.M.Webber & P.W.Ball accepted as Carex radiata (Wahlenb.) Small
- Species Carex szovitsii V.I.Krecz. accepted as Carex paniculata subsp. szovitsii (V.I.Krecz.) Ö.Nilsson
- Species Carex tabina Steud. accepted as Carex fuscoatra Boecheler
- Species Carex tabularia M.A.Curtis ex Boott accepted as Carex aestivalis M.A.Curtis ex A.Gray
- Species Carex tagawana T.Koyama accepted as Carex fulvorubescens subsp. longistipes (Hayata) T.Koyama
- Species Carex tahoata Hamlin accepted as Carex dipsacea Berggr.
- Species Carex taiheiensis Hayata accepted as Carex sclerocarpa Franch.
- Species Carex taihokuensis Hayata accepted as Carex blinii H.Lév. & Vaniot
- Species Carex taipaishanica K.T.Fu accepted as Carex basiflora C.B.Clarke
- Species Carex taiwanensis (Ohwi) Akiyama accepted as Carex dissitiflora subsp. taiwanensis (Ohwi) T.Koyama
- Species Carex takasagoana Akiyama accepted as Carex manca subsp. takasagoana (Akiyama) T.Koyama
- Species Carex takenakai Nakai accepted as Carex karoi Freyn
- Species Carex takeshimensis Nakai accepted as Carex shimidzensis Franch.
- Species Carex takhtadjanii Jac.Koopman & Wieclaw
- Species Carex takoensis Y.Endo & Yashiro
- Species Carex taliensis Franch. accepted as Carex rubrobrunnea var. taliensis (Franch.) Kük.
- Species Carex taquetii H.Lév. accepted as Carex matsumurae Franch.
- Species Carex taraspensis Brügger & Killias accepted as Carex muelleriana F.W.Schultz
- Species Carex tartarea Ridl. accepted as Carex verticillata Zoll. & Moritzi
- Species Carex tarumensis Franch. accepted as Carex buxbaumii Wahlenb.
- Species Carex taskanensis A.P.Khokhr. accepted as Carex atrofusca subsp. atrofusca Schkuhr
- Species Carex tasorum Kom. accepted as Carex tenuiformis var. tenuiformis H.Lév. & Vaniot
- Species Carex tatewakiana Ohwi accepted as Carex perakensis var. perakensis C.B.Clarke
- Species Carex tatrorum (Zapał.) Racib. accepted as Carex sempervirens Vill.
- Species Carex tatsutakensis Hayata accepted as Carex blinii H.Lév. & Vaniot
- Species Carex tauricola Boiss. accepted as Carex atrata subsp. atrata L.
- Species Carex taurina Phil. accepted as Carex gayana Desv.
- Species Carex taylorii Nelmes accepted as Carex phragmitoides Kük.
- Species Carex tchenkeouensis E.G.Camus accepted as Carex thibetica var. thibetica Franch.
- Species Carex tenacissima Suksd. accepted as Carex nudata W.Boott
- Species Carex tenax Reut. accepted as Carex austroalpina Bech.
- Species Carex tendae (W.Dietr.) Pawł. accepted as Carex austroalpina Bech.
- Species Carex tenebricans Holmb.
- Species Carex tenella Poir. accepted as Carex austrotenella K.L.Wilson
- Species Carex tenella Ehrh. accepted as Carex canescens subsp. canescens L.
- Species Carex tenella Schkuhr accepted as Carex disperma Dewey
- Species Carex tenella Thuill. accepted as Carex praecox Schreb.
- Species Carex tenelliformis Holmb.
- Species Carex teneriformis Mack. accepted as Carex subfusca W.Boott
- Species Carex tenerrina Murr & Appel accepted as Carex ferruginea Scop.
- Species Carex tenorei Kunth accepted as Carex macrolepis DC.
- Species Carex tentaculata Muhl. ex Willd. accepted as Carex lurida Wahlenb.
- Species Carex tenuiflora Hartm. ex Kunth accepted as Carex loliacea L.
- Species Carex tenuifolia Poir. accepted as Carex halleriana Asso
- Species Carex tenuirostrata X.F.Jin, S.H.Jin & D.F.Wu accepted as Carex pendula Huds.
- Species Carex tenuirostris Olney accepted as Carex athrostachya Olney
- Species Carex tenuis Host accepted as Carex brachystachys Schrank
- Species Carex tenuis Rudge accepted as Carex debilis var. rudgei L.H.Bailey
- Species Carex tenuis Nees accepted as Carex plectobasis V.I.Krecz.
- Species Carex tenuis (Retz.) J.F.Gmel. accepted as Scleria lithosperma var. lithosperma (L.) Sw.
- Species Carex tenuiseta Franch. accepted as Carex scita var. tenuiseta (Franch.) Yonek.
- Species Carex tenuispica Steud. accepted as Carex brunnea subsp. brunnea Thunb.
- Species Carex tenuispica Boeckeler accepted as Carex stricta Lam.
- Species Carex tenuissima Schur accepted as Carex muricata subsp. muricata L.
- Species Carex tenuissima Boott accepted as Carex polyschoena H.Lév. & Vaniot
- Species Carex tenuistachya Nakai accepted as Carex longirostrata subsp. longirostrata C.A.Mey.
- Species Carex teramotoi T.Koyama accepted as Carex multifolia var. toriiana T.Koyama
- Species Carex teretiuscula Willk. accepted as Carex chordorrhiza L.f.
- Species Carex teretiuscula Gooden. accepted as Carex diandra Schrank
- Species Carex tergestina Hoppe ex Boott accepted as Carex muricata subsp. muricata L.
- Species Carex ternaria J.F.Gmel.
- Species Carex ternaria G.Forst. accepted as Carex geminata Schkuhr
- Species Carex ternaria G.Forst. ex Boott accepted as Carex geminata Schkuhr
- Species Carex ternaria Meinsh. accepted as Carex tuminensis Kom.
- Species Carex terniflora Maxim. ex Matsum. accepted as Carex grallatoria var. heteroclita (Franch.) Kük. ex Matsum.
- Species Carex terrae-novae Fernald accepted as Carex glacialis Mack.
- Species Carex terschellingensis Jac.Koopman, Wieclaw & Waltje
- Species Carex tessellata Spruce ex C.B.Clarke accepted as Carex acutata Boott
- Species Carex tetanica Schwein. & Torr. accepted as Carex conoidea Willd.
- Species Carex tetanica Rchb. accepted as Carex vaginata var. vaginata Tausch
- Species Carex tetrastachya Traunst. ex Saut. accepted as Carex biharica Simonk.
- Species Carex tetrasticha Boeckeler accepted as Carex brasiliensis A.St.-Hil.
- Species Carex textorii Miq. accepted as Carex incisa Boott
- Species Carex thecata Boott accepted as Carex preissii Nees
- Species Carex thermalis K.Nagas. & S.Sakag.
- Species Carex thermarum Phil. accepted as Carex macloviana var. thermarum (Phil.) Kük.
- Species Carex thomasii Nelmes accepted as Carex mannii subsp. thomasii (Nelmes) Luceño & M.Escudero
- Species Carex thompsonii Franch. accepted as Carex thomsonii Boott
- Species Carex thompsonii Petrie accepted as Carex thomsonii Boott
- Species Carex thomsonii Petrie accepted as Carex pterocarpa Petrie
- Species Carex thomsonii Gand. accepted as Carex pterocarpa Petrie
- Species Carex thorelii E.G.Camus accepted as Carex tricephala Boeckeler
- Species Carex thulensis Fr. accepted as Carex salina var. salina Wahlenb.
- Species Carex thuringiaca Willd. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex thwaitesii Hance accepted as Carex hebecarpa C.A.Mey.
- Species Carex thymicola Sennen
- Species Carex thyrsiflora Boott accepted as Carex lindleyana Nees
- Species Carex timmiana Junge
- Species Carex timorensis (C.B.Clarke) Nelmes accepted as Carex rafflesiana Boott
- Species Carex tiogana D.W.Taylor & J.D.Mastrog. accepted as Carex capillaris subsp. capillaris L.
- Species Carex tobae Honda accepted as Carex heterolepis Bunge
- Species Carex toezensis Simonk.
- Species Carex tokioensis Boeckeler accepted as Carex japonica Thunb.
- Species Carex tolmiei Boott accepted as Carex spectabilis Dewey
- Species Carex tomentosa Hornem. accepted as Carex globularis L.
- Species Carex tonkinensis Franch. accepted as Carex perakensis var. perakensis C.B.Clarke
- Species Carex tonnerrei C.B.Clarke accepted as Carex gentilis var. gentilis Franch.
- Species Carex torfacea J.F.Gmel. accepted as Carex rostrata var. rostrata Stokes
- Species Carex torfacea Fr. accepted as Carex turfosa Fr.
- Species Carex torgesiana Kük.
- Species Carex tornabenei Chiov.
- Species Carex torreyana Dewey accepted as Carex davisii Schwein. & Torr.
- Species Carex tosaensis Akiyama accepted as Carex leucochlora var. meridiana Akiyama
- Species Carex tosana Makino accepted as Carex insaniae var. subdita (Ohwi) Ohwi
- Species Carex touranginiana Boreau accepted as Carex acuta L.
- Species Carex tourletii Gillot ex Tourlet accepted as Carex muelleriana F.W.Schultz
- Species Carex trachyantha Dorner ex Heuff. accepted as Carex depressa subsp. transsilvanica (Schur) K.Richt.
- Species Carex trachycarpos Link accepted as Carex flacca subsp. flacca Schreb.
- Species Carex trachycystis Griseb. accepted as Carex bonariensis var. bonariensis Desf. ex Poir.
- Species Carex tracyi Mack. accepted as Carex leporina L.
- Species Carex transalaica Tzvelev accepted as Carex orbicularis subsp. orbicularis Boott
- Species Carex transalpina Hayata accepted as Carex sociata Boott
- Species Carex transcaucasica T.V.Egorova accepted as Carex nigra subsp. transcaucasica (T.V.Egorova) Jim.Mejías, G.E.Rodr.-Pal., Amini Rad & Martín-Bravo
- Species Carex transmarina V.I.Krecz. accepted as Carex maritima Gunnerus
- Species Carex transsilvanica Schur accepted as Carex depressa subsp. transsilvanica (Schur) K.Richt.
- Species Carex transversa Miq. accepted as Carex brownii Tuck.
- Species Carex trappistarum Franch. accepted as Carex heterolepis Bunge
- Species Carex tremula (Ohwi) Ohwi accepted as Carex filipes var. tremula (Ohwi) Ohwi
- Species Carex treverica Hausskn.
- Species Carex tricarinata H.Lév. & Vaniot accepted as Carex planiculmis Kom.
- Species Carex triceps Schrank accepted as Carex pilulifera L.
- Species Carex triceps Michx. accepted as Carex hirsutella Mack.
- Species Carex trichina Fernald
- Species Carex trichocarpa Schur accepted as Carex sempervirens Vill.
- Species Carex tricholoma S.T.Blake accepted as Carex breviculmis var. perciliata Kük.
- Species Carex trichopoda Franch. accepted as Carex podogyna Franch. & Sav.
- Species Carex trichosperma Ohwi accepted as Carex dolichostachya subsp. trichosperma (Ohwi) T.Koyama
- Species Carex trichostachya Fisch. ex Boott accepted as Carex podocarpa R.Br.
- Species Carex trichostyles Franch. & Sav. accepted as Carex japonica Thunb.
- Species Carex tricostata Fr. accepted as Carex acuta L.
- Species Carex tricuspidata Kük. accepted as Carex brachyanthera Ohwi
- Species Carex triflora Schkuhr accepted as Carex depauperata Curtis ex Woodw.
- Species Carex triflora Willd. accepted as Carex depauperata Curtis ex Woodw.
- Species Carex triflora Vahl ex Kunth accepted as Carex vaginata var. vaginata Tausch
- Species Carex trigona All. accepted as Carex hostiana DC.
- Species Carex trinervis Nees accepted as Carex esenbeckii Kunth
- Species Carex tripartita All. accepted as Carex lachenalii subsp. lachenalii Schkuhr
- Species Carex triquetrifolia Boeckeler accepted as Carex monostachya A.Rich.
- Species Carex trisperma A.Gray ex Boott accepted as Carex rosea Willd.
- Species Carex trispiculata Boeckeler accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex tristicha Boeckeler accepted as Carex stricta Lam.
- Species Carex tristicha Spruce ex Boott accepted as Carex tamana Steyerm.
- Species Carex triticea Wahlenb. ex Steud. accepted as Carex clavata Thunb.
- Species Carex truncata Fenzl accepted as Carex flacca subsp. flacca Schreb.
- Species Carex truncata Boeckeler accepted as Carex laxiflora var. laxiflora Lam.
- Species Carex truncatula Kit.
- Species Carex tsangensis Franch. accepted as Carex setigera var. schlagintweitiana (Boeckeler) Kük.
- Species Carex tuberculata Nees ex Boott accepted as Carex bonariensis var. bonariensis Desf. ex Poir.
- Species Carex tuberosa Degl. accepted as Carex distachya var. distachya Desf.
- Species Carex tuberosa Blanco accepted as Eleocharis dulcis (Burm.f.) Trin. ex Hensch.
- Species Carex tubulata K.Schum. ex Boott accepted as Carex buxbaumii Wahlenb.
- Species Carex tuckermanii Dewey
- Species Carex tucumanensis G.A.Wheeler accepted as Carex niederleiniana Boeckeler
- Species Carex tumida Beilschm. accepted as Carex nigra (L.) Reichard
- Species Carex tumidicarpa Andersson accepted as Carex demissa subsp. demissa Hornem.
- Species Carex turczaninofii Steud. ex Boott accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex turczaninowiana Meinsh. ex Korsh. accepted as Carex arnellii Christ ex Scheutz
- Species Carex turfosa Fr.
- Species Carex turgescens Dewey accepted as Carex louisianica L.H.Bailey
- Species Carex turgida (Fernald) J.W.Moore accepted as Carex grisea Wahlenb.
- Species Carex turgidula L.H.Bailey accepted as Carex aperta Boott
- Species Carex turuli Simonk.
- Species Carex tymphaea Formánek accepted as Carex pallescens L.
- Species Carex typhinoides Schwein. accepted as Carex squarrosa L.
- Species Carex typhoides Bory accepted as Carex borbonica Lam.
- Species Carex tyttholepis Nelmes accepted as Carex lamprochlamys S.T.Blake
- Species Carex tytthospica Melnikov accepted as Carex parvula O.Yano
- Species Carex uberior (C.Mohr) Mack. accepted as Carex stipata var. maxima Chapm. ex Boott
- Species Carex udensis Meinsh. accepted as Carex vesicaria L.
- Species Carex uechtritziana K.Richt.
- Species Carex uetliaca Suter accepted as Carex flava L.
- Species Carex ulaviformis Hoppe accepted as Carex flacca subsp. flacca Schreb.
- Species Carex uleana Boeckeler accepted as Carex seticulmis Boeckeler
- Species Carex uliginosa L. accepted as Blysmus compressus subsp. compressus (L.) Panzer ex Link
- Species Carex uncinata Schkuhr ex Steud. accepted as Carex hamata Sw.
- Species Carex uncompahgre Kelso accepted as Carex bella L.H.Bailey
- Species Carex underwoodii Britton accepted as Carex polysticha Boeckeler
- Species Carex undulata Kunze accepted as Carex pallescens L.
- Species Carex ungavensis Lepage
- Species Carex unifoliata Kük. & Hand.-Mazz. accepted as Carex parva Nees
- Species Carex uraiensis Hayata accepted as Carex sociata Boott
- Species Carex uralensis C.B.Clarke accepted as Carex stenophylla subsp. stenophylla Wahlenb.
- Species Carex urbani Boeckeler accepted as Carex oederi var. oederi Retz.
- Species Carex urbanii Boeckeler accepted as Carex urbani Boeckeler
- Species Carex urbis-malorum Popov accepted as Carex caucasica subsp. caucasica Steven
- Species Carex urolepis Franch. accepted as Carex darwinii var. urolepis (Franch.) Kük.
- Species Carex urostachys Franch. accepted as Carex mertensii var. urostachys (Franch.) Kük.
- Species Carex urvillei Brongn. accepted as Carex pumila Thunb.
- Species Carex ushishirensis Ohwi accepted as Carex glareosa subsp. glareosa Schkuhr ex Wahlenb.
- Species Carex usta Franch. accepted as Carex cespitosa L.
- Species Carex usta L.H.Bailey accepted as Carex douglasii Boott
- Species Carex ustulata Wahlenb. accepted as Carex atrofusca Schkuhr
- Species Carex uzenensis Koidz.
- Species Carex uzoni Kom. accepted as Carex aquatilis var. minor Boott
- Species Carex vacillans Steud. accepted as Carex riparia Curtis
- Species Carex vacillans Sol. ex Boott accepted as Carex spinirostris Colenso
- Species Carex vagans Holm accepted as Carex vallicola Dewey
- Species Carex vaginiformis Tuck. accepted as Carex vulpinoidea Michx.
- Species Carex vahlii Schkuhr accepted as Carex norvegica subsp. norvegica Retz.
- Species Carex valdiviana Phil. accepted as Carex fuscula d'Urv.
- Species Carex valesiaca Suter accepted as Carex brachystachys Schrank
- Species Carex valesiaca Wahlenb. accepted as Carex oedipostyla Duval-Jouve
- Species Carex valida Nees accepted as Carex cruciata Wahlenb.
- Species Carex vallata Charit.
- Species Carex vansteenisii Kük. accepted as Carex perakensis var. vansteenisii (Kük.) Noot.
- Species Carex vanvleckii Schwein. accepted as Carex digitalis var. digitalis Willd.
- Species Carex var. (Franch.) Ohwi accepted as Carex maackii Maxim.
- Species Carex varia Muhl. ex Wahlenb. accepted as Carex albicans var. albicans Willd. ex Spreng.
- Species Carex varia Host accepted as Carex sempervirens Vill.
- Species Carex varia Willd. ex Wahlenb. accepted as Carex albicans Willd. ex Spreng.
- Species Carex variabilis L.H.Bailey accepted as Carex aquatilis var. aquatilis Wahlenb.
- Species Carex varians (L.H.Bailey) Hay, Palmer & C.T.White accepted as Carex leptonervia (Fernald) Fernald
- Species Carex varica C.B.Clarke accepted as Carex aquatilis Wahlenb.
- Species Carex variegata Scheele accepted as Carex barrattii Torr. ex Schwein.
- Species Carex variegata Lam. accepted as Carex frigida All.
- Species Carex vaseyi Dewey accepted as Carex vesicaria L.
- Species Carex velenovskyi Domin accepted as Carex praecox Schreb.
- Species Carex venosivaginata Standl. & Steyerm. accepted as Carex pertenuis L.H.Bailey
- Species Carex ventricosa Curtis accepted as Carex depauperata Curtis ex Woodw.
- Species Carex ventricosa Franch. accepted as Carex utriculata Boott
- Species Carex venustula Holm accepted as Carex podocarpa R.Br.
- Species Carex verae Ovcz. & Czukav. accepted as Carex turkestanica Regel
- Species Carex verecunda Holm accepted as Carex inops L.H.Bailey
- Species Carex verna Chaix accepted as Carex caryophyllea Latourr.
- Species Carex verna Lam. accepted as Carex flacca subsp. flacca Schreb.
- Species Carex verna Torr. ex Kunth accepted as Carex praecox Schreb.
- Species Carex verna Schkuhr accepted as Carex supina var. supina Willd. ex Wahlenb.
- Species Carex vernicosa Franch. ex C.B.Clarke accepted as Carex aphanolepis Franch. & Sav.
- Species Carex verrucosa Schwein. ex Torr. accepted as Carex stricta Lam.
- Species Carex versicolor Dumort. accepted as Carex binervis Sm.
- Species Carex verticillata Boott accepted as Carex interrupta Boeckeler
- Species Carex vesiciformis Peterm. accepted as Carex vesicaria L.
- Species Carex vespertina (L.H.Bailey) Howell accepted as Carex inops subsp. inops L.H.Bailey
- Species Carex vexilis Wormsk. ex Boott accepted as Carex michelii Host
- Species Carex viadrina Figert
- Species Carex vicaria L.H.Bailey accepted as Carex densa (L.H.Bailey) L.H.Bailey
- Species Carex victorialis Nees accepted as Carex notha Kunth
- Species Carex victorinii Sennen & Elías accepted as Carex paniculata subsp. lusitanica (Willd.) Maire
- Species Carex vidalii Franch. & Sav. accepted as Carex nervata Franch. & Sav.
- Species Carex vierhapperi Beck accepted as Carex gerhardtii Figert
- Species Carex vikingensis C.B.Clarke accepted as Carex distans subsp. distans L.
- Species Carex villacensis Kük.
- Species Carex villarsii Willd. accepted as Carex foetida All.
- Species Carex villosa Franch. & Sav. accepted as Carex davalliana Sm.
- Species Carex villosa Stokes accepted as Carex hirta L.
- Species Carex villosa Boott accepted as Carex latisquamea Kom.
- Species Carex vilmorinii Mottet accepted as Carex comans Berggr.
- Species Carex vimariensis Hausskn. ex Berthold
- Species Carex violacea C.B.Clarke accepted as Carex nova L.H.Bailey
- Species Carex virens Thuill. accepted as Carex acuta L.
- Species Carex virens Lam. accepted as Carex divulsa Stokes
- Species Carex virgata Sol. ex Boott accepted as Carex appressa R.Br.
- Species Carex virgata Miq. accepted as Carex rafflesiana Boott
- Species Carex virginiana Wood accepted as Carex acuta L.
- Species Carex virginiana (Fernald) Fernald accepted as Carex crus-corvi Shuttlew. ex Kunze
- Species Carex virginica Steud. accepted as Carex acuta L.
- Species Carex viridiflora Mack. accepted as Carex perlonga Fernald
- Species Carex viridior Mack. accepted as Carex atrosquama Mack.
- Species Carex viridis Honck. accepted as Carex flava L.
- Species Carex viridis Petrie accepted as Carex muelleri Petrie
- Species Carex viridis Spenn. accepted as Carex muricata subsp. muricata L.
- Species Carex viridis Schltdl. & Cham. accepted as Carex perlonga Fernald
- Species Carex viridissima Nakai accepted as Carex matsumurae Franch.
- Species Carex viridula Michx. accepted as Carex oederi var. oederi Retz.
- Species Carex viridula Franch. & Sav. accepted as Carex curvicollis Franch. & Sav.
- Species Carex viridula Schwein. & Torr. accepted as Carex hirsutella Mack.
- Species Carex vitiensis H.St.John accepted as Carex gibbsiae Rendle
- Species Carex vitilis Fr. accepted as Carex brunnescens subsp. brunnescens (Pers.) Poir.
- Species Carex vitrea Holm accepted as Carex alma L.H.Bailey
- Species Carex vladimiroviensis H.Lév. accepted as Carex schmidtii Meinsh.
- Species Carex vleckii Schwein. accepted as Carex oligocarpa Willd.
- Species Carex volcanica F.J.Herm. accepted as Carex orizabae Liebm.
- Species Carex volckmannii Phil.
- Species Carex volkensii K.Schum. accepted as Carex johnstonii Boeckeler
- Species Carex vorobjevii A.E.Kozhevn. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex vratislaviensis Figert
- Species Carex vulcanica Elmer accepted as Carex nodiflora Boeckeler
- Species Carex vulcanicola Nakai accepted as Carex myosuroides Vill.
- Species Carex vulgaris Fr. accepted as Carex nigra (L.) Reichard
- Species Carex vulpi-caudata Akiyama accepted as Carex appendiculata (Trautv. & C.A.Mey.) Kük.
- Species Carex vulpina J.Carey ex Dewey accepted as Carex conjuncta Boott
- Species Carex vulpina Hohen. accepted as Carex muricata subsp. muricata L.
- Species Carex vulpiniformis Tuck. accepted as Carex vulpinoidea Michx.
- Species Carex wahlenbergiana C.B.Clarke accepted as Carex pyramidalis Kük.
- Species Carex walasii Ceyn.-Gield
- Species Carex wallichiana Prescott ex Nees accepted as Carex fedia Nees
- Species Carex wallii Petrie accepted as Carex capillacea var. capillacea Boott
- Species Carex walteriana L.H.Bailey accepted as Carex striata Michx.
- Species Carex warburgiana Kük. accepted as Carex mahinoensis Franch.
- Species Carex wardiana H.Lév. & Vaniot accepted as Carex microtricha Franch.
- Species Carex warmingii Holm ex Lange accepted as Carex bigelowii subsp. bigelowii Torr. ex Schwein.
- Species Carex warmingii Holm accepted as Carex bigelowii Torr. ex Schwein.
- Species Carex washingtonia Eaton accepted as Carex aquatilis var. minor Boott
- Species Carex washingtoniana Dewey accepted as Carex bigelowii subsp. bigelowii Torr. ex Schwein.
- Species Carex watsoniana Steud. accepted as Carex stricta Lam.
- Species Carex watsonii Olney accepted as Carex riparia Curtis
- Species Carex watsonii Boott accepted as Carex vulcani Hochst. ex Seub.
- Species Carex wazmanni Schrank accepted as Carex sempervirens Vill.
- Species Carex weiheana Boeckeler ex Kunth accepted as Carex praecox Schreb.
- Species Carex welwitschii Boiss. ex Steud. accepted as Carex laevigata Sm.
- Species Carex wenchenii F.T.Wang & Tang accepted as Carex serreana Hand.-Mazz.
- Species Carex wendelboi Nelmes accepted as Carex vulpinaris Nees
- Species Carex wichurae Boeckeler accepted as Carex manca subsp. manca Boott
- Species Carex wilfordii C.B.Clarke accepted as Carex wahuensis subsp. robusta (Franch. & Sav.) T.Koyama
- Species Carex wilkesii Olney accepted as Carex aquatilis var. dives (Holm) Kük.
- Species Carex wiluica Meinsh. ex Maack accepted as Carex nigra subsp. juncea (Fr.) Soó
- Species Carex wiluica Meinsh. accepted as Carex juncella T.M.Fries
- Species Carex wimmeri Steud. accepted as Carex acuta L.
- Species Carex winkelmannii Asch. & Graebn.
- Species Carex winkleri Lange accepted as Carex mairei Coss. & Germ.
- Species Carex witheringii Gray accepted as Carex arenaria L.
- Species Carex wohllebii Hoppe accepted as Carex obtusata Lilj.
- Species Carex wolteri Gross
- Species Carex wormskioldiana Hornem. accepted as Carex scirpoidea var. scirpoidea Michx.
- Species Carex wormskioldii (Raf.) Drejer accepted as Carex scirpoidea var. scirpoidea Michx.
- Species Carex woroschilovii A.E.Kozhevn. accepted as Carex pediformis var. pediformis C.A.Mey.
- Species Carex wrightii Dewey ex Torr. accepted as Carex microdonta Torr.
- Species Carex wrightii Franch. accepted as Carex oxyandra var. oxyandra (Franch. & Sav.) Kudô
- Species Carex wushanensis S.Yun Liang accepted as Carex longirostrata subsp. longirostrata C.A.Mey.
- Species Carex wuyishanensis S.Yun Liang accepted as Carex graciliflora Dunn
- Species Carex xalapensis Kunth accepted as Carex muehlenbergii var. xalapensis (Kunth) Britton
- Species Carex xanthathera Franch. accepted as Carex scita var. scabrinervia (Franch.) Kük.
- Species Carex xanthina Fernald accepted as Carex xanthocarpa Degl.
- Species Carex xanthocarpa Degl.
- Species Carex xanthocarpa E.P.Bicknell accepted as Carex annectens (E.P.Bicknell) E.P.Bicknell
- Species Carex xanthophysa Wahlenb. accepted as Carex folliculata L.
- Species Carex xanthosperma Dewey accepted as Carex flaccosperma Dewey
- Species Carex xerocarpa S.H.Wright accepted as Carex stricta Lam.
- Species Carex xestogyne Nelmes accepted as Carex rafflesiana Boott
- Species Carex xiangxiensis Z.P.Wang accepted as Carex retrofracta subsp. retrofracta Kük.
- Species Carex xuanchengensis S.W.Su & S.M.Xu accepted as Carex truncatirostris S.W.Su & S.M.Xu
- Species Carex xyphium Kom. accepted as Carex xiphium Kom.
- Species Carex yabei H.Lév. & Vaniot accepted as Carex scabrifolia Steud.
- Species Carex yakusimensis Masam. accepted as Carex multifolia var. multifolia Ohwi
- Species Carex yanchengii S.R.Zhang accepted as Carex hohxilensis (R.F.Huang) S.R.Zhang
- Species Carex yedoensis Boeckeler accepted as Carex arenicola F.Schmidt
- Species Carex yesinensis Franch. accepted as Carex foliosissima var. foliosissima F.Schmidt
- Species Carex yesoensis Koidz. accepted as Carex lanceolata var. lanceolata Boott
- Species Carex yezo-alpina Akiyama accepted as Carex kabanovii V.I.Krecz.
- Species Carex yezo-montana Akiyama accepted as Carex blepharicarpa Franch.
- Species Carex yingkiliensis A.I.Baranov & Skvortsov accepted as Carex mollissima Christ ex Scheutz
- Species Carex yinshanica Y.Z.Zhao
- Species Carex yodoensis Boeckeler accepted as Carex nubigena subsp. nubigena D.Don
- Species Carex yosemitana L.H.Bailey accepted as Carex sartwelliana Olney
- Species Carex yoshinoi Ohwi accepted as Carex conica var. conica Boott
- Species Carex yukonensis Britton accepted as Carex bigelowii subsp. lugens (Holm) T.V.Egorova
- Species Carex yungningensis Hand.-Mazz. & Kük. accepted as Carex fluviatilis Boott
- Species Carex zahnii Kneuck.
- Species Carex zeyheri C.B.Clarke accepted as Carex capensis Thunb.
- Species Carex zollingeri Kunze ex Steud. accepted as Carex doniana Spreng.
- Species Carex zonata F.Nyl. accepted as Carex nigra subsp. juncea (Fr.) Soó
- Species Carex zuluensis C.B.Clarke accepted as Carex steudneri Boeckeler
- Tribe Carpheae Semmouri & Larridon (18)
- Tribe Chrysitricheae Nees (14)
- Tribe Cladieae Nees (4)
- Tribe Cryptangieae Benth. (57)
- Tribe Cypereae Dumort. (1 133)
- Tribe Dulichieae W.Schultze‐Motel (3)
- Tribe Eleocharideae Goetgh. (312)
- Tribe Fimbristylideae Cherm. ex J.Raynal
- Tribe Fuireneae Rchb. ex Fenzl (55)
- Tribe Hypolytreae Pers. (175)
- Tribe IncertaeSedis (1)
- Tribe Khaosokieae Lév.‐Bourret & J.R.Starr (1)
- Tribe Koyamaeae W.W.Thomas & Davidse
- Tribe Lipocarpheae Cherm. ex T.Koyama
- Tribe Micropapyreae L.T.Eiten
- Tribe Pseudoschoeneae J.R.Starr (76)
- Tribe Rhynchosporeae Nees (389)
- Tribe Schenoplectae
- Tribe Schoeneae Dumort. (461)
- Tribe Schoenoplecteae Lye accepted as Schoenoplectieae Lye
- Tribe Schoenoplectieae Lye (25)
- Tribe Scirpeae T.Lestib. (82)
- Tribe Sclerieae Wight & Arn. (261)
- Tribe Sumatroscirpeae Lév.‐Bourret & J.R.Starr (4)
- Tribe Syntrinemeae L.T.Eiten
- Tribe Trichophoreae Lév.‐Bourret & J.R.Starr (21)
- Tribe Trilepideae Goetgh. (16)
- Subtribe Actinoscirpinae Tatanov
- Subtribe Bolboschoeninae Tatanov
- Subtribe Lipocarphinae
- Subtribe Schoenoplectinae Tatanov
- Genus Abildgardia Rchb. accepted as Fimbristylis Vahl
- Genus Abilgaardia Poir.
- Genus Acorellus Palla ex Kneuck. accepted as Cyperus L.
- Genus Acorus
- Genus Acriulus Ridl. accepted as Scleria P.J.Bergius
- Genus Acrocarpus Nees accepted as Krenakia S.M.Costa
- Genus Acrolepis Schrad. accepted as Ficinia Schrad.
- Genus Actaeogeton Steud. accepted as Scirpus Tourn. ex L.
- Genus Adamantogeton Schrad. ex Nees accepted as Lagenocarpus Nees
- Genus Adulpa Endl.
- Genus Adupla Bosc ex Juss. accepted as Cyperus L.
- Genus Adupla Bosc
- Genus Agistron Raf. accepted as Carex L.
- Genus Agylla Phil. accepted as Machaerina Vahl
- Genus Albikia J.Presl & C.Presl accepted as Hypolytrum Pers.
- Genus Aliniella J.Raynal accepted as Cyperus L.
- Genus Alinula J.Raynal accepted as Cyperus L.
- Genus Ammorrhiza Ehrh. accepted as Carex L.
- Genus Androcoma Nees accepted as Cyperus L.
- Genus Androtrichum (Brongn.) Brongn. accepted as Cyperus L.
- Genus Anerma Schrad. ex Nees accepted as Scleria P.J.Bergius
- Genus Anithista Raf. accepted as Carex L.
- Genus Anogyna Nees accepted as Lagenocarpus Nees
- Genus Anosporum Nees accepted as Cyperus L.
- Genus Anthophyllum Steud. accepted as Ficinia Schrad.
- Genus Antrolepis Welw. accepted as Cyperus L.
- Genus Apartea Pellegr. accepted as Mapania Aubl.
- Genus Aplostemon Raf. accepted as Fimbristylis Vahl
- Genus Archaeocarex Börner accepted as Carex L.
- Genus Ascolepis Nees ex Steud. accepted as Cyperus L.
- Genus Ascopholis C.E.C.Fisch. accepted as Cyperus L.
- Genus Asterochaete Nees (9)
- Genus Asteroschoenus Nees accepted as Rhynchospora Vahl
- Genus Astroschoenus Lindl. accepted as Rhynchospora Vahl
- Genus Atomostylis Steud. accepted as Cyperus L.
- Genus Aulacorhynchus Nees accepted as Tetraria P.Beauv.
- Genus Baeochortus Ehrh. accepted as Carex L.
- Genus Baeothryon Ehrh. ex A.Dietr. accepted as Eleocharis R.Br.
- Genus Baumea Gaudich. accepted as Machaerina Vahl
- Genus Beera P.Beauv. ex T.Lestib. accepted as Hypolytrum Pers.
- Genus Bitteria Börner accepted as Carex L.
- Genus Blepharolepis Nees accepted as Scirpus Tourn. ex L.
- Genus Blismus Friche-Joset & Montandon
- Genus Blysmocarex N.A.Ivanova accepted as Carex L.
- Genus Blysmopsis Oteng-Yeb. accepted as Blysmus Panz. ex Schult.
- Genus Blysmoschoenus Palla
- Genus Boeckeleria T.Durand accepted as Tetraria P.Beauv.
- Genus Bolboschoenoplectus Tatanov accepted as Bolboschoenus (Asch.) Palla
- Genus Borabora Steud. accepted as Cyperus L.
- Genus Buekia Nees accepted as Neesenbeckia Levyns
- Genus Buekia A.Rich.
- Genus Bulbostylis Steven accepted as Eleocharis R.Br.
- Genus Callistachys Heuff. accepted as Carex L.
- Genus Calyptrolepis Steud. accepted as Rhynchospora Vahl
- Genus Calyptrostylis Nees accepted as Rhynchospora Vahl
- Genus Campylostachys E.Mey. accepted as Fimbristylis Vahl
- Genus Capitularia Valck.Sur. accepted as Capitularina J.Kern
- Genus Caricella Ehrh. accepted as Carex L.
- Genus Caricina St.-Lag. accepted as Carex L.
- Genus Caricina C.H.Hitchc.
- Genus Caricinella St.-Lag. accepted as Carex L.
- Genus Catagyna P.Beauv. ex T.Lestib. accepted as Scleria P.J.Bergius
- Genus Catagyna Hutch. & Dalziel accepted as Afrotrilepis (Gilly) J.Raynal
- Genus Cephaloschoenus Nees accepted as Rhynchospora Vahl
- Genus Cephaloscirpus Kurz accepted as Mapania Aubl.
- Genus Ceratoschoenus Nees accepted as Rhynchospora Vahl
- Genus Chaetocyperus Nees accepted as Eleocharis R.Br.
- Genus Chaetospora R.Br. (3)
- Genus Chamaegyne Suess. accepted as Eleocharis R.Br.
- Genus Chamaeschoenus Ehrh. accepted as Scirpus Tourn. ex L.
- Genus Chamaexiphium Hochst. ex Steud. accepted as Ficinia Schrad.
- Genus Chapelliera Nees accepted as Machaerina Vahl
- Genus Chillania Roiv. accepted as Eleocharis R.Br.
- Genus Chionanthula Börner accepted as Carex L.
- Genus Chlorocharis Rikli accepted as Eleocharis R.Br.
- Genus Chlorocyperus Rikli accepted as Cyperus L.
- Genus Chondrachne R.Br. accepted as Lepironia Rich. in Pers.
- Genus Chondrolomia Nees accepted as Scleria P.J.Bergius
- Genus Chordorrhiza Ehrh. accepted as Carex L.
- Genus Choricarpha Boeckeler accepted as Lepironia Rich. in Pers.
- Genus Cladotheca Steud. accepted as Lagenocarpus Nees
- Genus Clavula Dumort. accepted as Eleocharis R.Br.
- Genus Cleistocalyx Steud. accepted as Rhynchospora Vahl
- Genus Cobresia Pers. accepted as Carex L.
- Genus Coleachyron J.Gay ex Boiss. accepted as Carex L.
- Genus Comostemum Nees accepted as Cyperus L.
- Genus Courtoisia Nees accepted as Cyperus L.
- Genus Courtoisina Soják accepted as Cyperus L.
- Genus Crepidocarpus Klotzsch ex Boeckeler accepted as Cyperus L.
- Genus Crosslandia W.Fitzg. accepted as Fimbristylis Vahl
- Genus Cryptoglochin Heuff. accepted as Carex L.
- Genus Cryptopodium Schrad. ex Nees accepted as Scleria P.J.Bergius
- Genus Cyathochaete Benth.
- Genus Cyatochaete Kük.
- Genus Cyclocampe Steud. accepted as Schoenus L.
- Genus Cyclocampe Benth. & Hook.f. accepted as Costularia C.B.Clarke
- Genus Cylindrolepis Boeckeler accepted as Cyperus L.
- Genus Cylindropus Nees accepted as Scleria P.J.Bergius
- Genus Cymophyllus Mack. ex Britton & A.Br. accepted as Carex L.
- Genus Cyperoides Ség. accepted as Carex L.
- Genus Cypringlea M.T.Strong accepted as Trichophorum Pers.
- Genus Cyprolepis Steud. accepted as Cyperus L.
- Genus Dapedostachys Börner accepted as Carex L.
- Genus Decalepis Boeckeler accepted as Tetraria P.Beauv.
- Genus Desmiograstis Börner accepted as Carex L.
- Genus Desmoschoenus Hook.f. accepted as Ficinia Schrad.
- Genus Deweya Raf. accepted as Carex L.
- Genus Diaphora Lour. accepted as Scleria P.J.Bergius
- Genus Dichismus Raf. accepted as Scirpus Tourn. ex L.
- Genus Dichostylis P.Beauv. ex T.Lestib. accepted as Fimbristylis Vahl
- Genus Dichroma Ham. accepted as Rhynchospora Vahl
- Genus Dichromena Michx. accepted as Rhynchospora Vahl
- Genus Diclidium Schrad. ex Nees accepted as Cyperus L.
- Genus Didymia Phil. accepted as Cyperus L.
- Genus Didymonema C.Presl accepted as Gahnia J.R.Forst. & G.Forst.
- Genus Diemisa Raf. accepted as Carex L.
- Genus Diplarinus Raf. accepted as Scirpus Tourn. ex L.
- Genus Diplocarex Hayata accepted as Carex L.
- Genus Diplochaete Nees accepted as Rhynchospora Vahl
- Genus Diploscyphus Liebm. accepted as Scleria P.J.Bergius
- Genus Discopodium Steud. accepted as Tricostularia Nees ex Lehm.
- Genus Distimus Raf. accepted as Cyperus L.
- Genus Dornera Heuff. ex Schur accepted as Carex L.
- Genus Drymeia Ehrh. accepted as Carex L.
- Genus Durandia Boeckeler accepted as Scleria P.J.Bergius
- Genus Duval-jouvea Palla accepted as Cyperus L.
- Genus Echinochlaenia Börner accepted as Carex L.
- Genus Echinolytrum Desv. accepted as Fimbristylis Vahl
- Genus Echinoschoenus Nees & Meyen accepted as Rhynchospora Vahl
- Genus Ecklonea Steud. accepted as Trianoptiles Fenzl ex Endl.
- Genus Edritria Raf. accepted as Carex L.
- Genus Egleria L.T.Eiten accepted as Eleocharis R.Br.
- Genus Elaeocharis Brongn. accepted as Eleocharis R.Br.
- Genus Eleogenus Nees accepted as Eleocharis R.Br.
- Genus Eleogiton Link accepted as Isolepis R.Br.
- Genus Elyna Schrad. accepted as Carex L.
- Genus Elynanthus Nees accepted as Tetraria P.Beauv.
- Genus Elynanthus P.Beauv. ex T.Lestib.
- Genus Elytrospermum C.A.Mey. accepted as Schoenoplectus (Rchb.) Palla
- Genus Ephippiorhynchium Nees accepted as Rhynchospora Vahl
- Genus Epiandria C.Presl accepted as Gahnia J.R.Forst. & G.Forst.
- Genus Epiphystis Trin. accepted as Cyperus L.
- Genus Epischoenus C.B.Clarke accepted as Schoenus L.
- Genus Eriochaeta Torr. ex Steud. accepted as Rhynchospora Vahl
- Genus Eriophorella Holub accepted as Trichophorum Pers.
- Genus Eriophoropsis Palla accepted as Eriophorum L.
- Genus Eriospora Hochst. ex A.Rich. accepted as Coleochloa Gilly
- Genus Eucyperus Rikli accepted as Cyperus L.
- Genus Eurostorhiza Steud. accepted as Caustis R.Br.
- Genus Everardia Ridl. accepted as Cephalocarpus Nees
- Genus Exphaloschoenus Nees
- Genus Facolos Raf. accepted as Carex L.
- Genus Fimbristyles Schult.
- Genus Fintelmannia Kunth accepted as Trilepis Nees
- Genus Forexeta Raf. accepted as Carex L.
- Genus Froelichia Wulfen accepted as Carex L.
- Genus Galilea Parl. accepted as Cyperus L.
- Genus Gaunia Scop.
- Genus Gavnia Scop.
- Genus Genersichia Heuff. accepted as Carex L.
- Genus Gussonea A.Rich. accepted as Fimbristylis Vahl
- Genus Gussonea J.Presl & C.Presl accepted as Fimbristylis Vahl
- Genus Gymnochaeta Steud. accepted as Schoenus L.
- Genus Haloschoenus Nees accepted as Rhynchospora Vahl
- Genus Haplostylis Nees accepted as Rhynchospora Vahl
- Genus Hedychloa
- Genus Hedychloe Raf. accepted as Cyperus L.
- Genus Heleocharis T.Lestib. accepted as Eleocharis R.Br.
- Genus Heleogiton Schult. accepted as Schoenoplectus (Rchb.) Palla
- Genus Heleonastes Ehrh. accepted as Carex L.
- Genus Heleophylax P.Beauv. ex T.Lestib. accepted as Schoenoplectus (Rchb.) Palla
- Genus Heliocharis Lindl. accepted as Eleocharis R.Br.
- Genus Helonema Suess. accepted as Eleocharis R.Br.
- Genus Helothrix Nees accepted as Schoenus L.
- Genus Hemicarex Benth. accepted as Carex L.
- Genus Hemicarpha Nees accepted as Cyperus L.
- Genus Hemichlaena Schrad. accepted as Ficinia Schrad.
- Genus Heuffelia Opiz accepted as Carex L.
- Genus Holmia Börner accepted as Carex L.
- Genus Holoschoenus Link accepted as Scirpoides Ség.
- Genus Homalostachys Boeckeler accepted as Carex L.
- Genus Hoppia Nees accepted as Bisboeckelera Kuntze
- Genus Hydroschoenus Zoll. & Moritzi accepted as Cyperus L.
- Genus Hygrocharis Nees accepted as Rhynchospora Vahl
- Genus Hymenochaeta P.Beauv. ex T.Lestib. accepted as Actinoscirpus (Ohwi) R.W.Haines & Lye
- Genus Hymenolytrum Schrad. ex Nees accepted as Scleria P.J.Bergius
- Genus Hypaelyptum Vahl accepted as Cyperus L.
- Genus Hypelythrum D.Dietr.
- Genus Hypoelytrum Kunth
- Genus Hypolepis P.Beauv. ex T.Lestib. accepted as Ficinia Schrad.
- Genus Hypophialium Nees accepted as Ficinia Schrad.
- Genus Hypoporum Nees accepted as Scleria P.J.Bergius
- Genus Ideleria Kunth accepted as Tetraria P.Beauv.
- Genus Indocourtoisia Bennet & Raizada accepted as Cyperus L.
- Genus Iria (Pers.) R.Hedw. accepted as Fimbristylis Vahl
- Genus Iriha Kuntze accepted as Fimbristylis Vahl
- Genus Isoschoenus Nees accepted as Schoenus L.
- Genus Itheta Raf. accepted as Carex L.
- Genus Juncellus C.B.Clarke accepted as Cyperus L.
- Genus Karinia Reznicek & McVaugh accepted as Scirpoides Ség.
- Genus Killinga T.Lestib. accepted as Cyperus L.
- Genus Killyngia Ham.
- Genus Kleistrocalyx Steud. accepted as Rhynchospora Vahl
- Genus Kobresia Willd. accepted as Carex L.
- Genus Kobria St.-Lag. accepted as Carex L.
- Genus Kolerma Raf. accepted as Carex L.
- Genus Kreczetoviczia Tzvelev accepted as Trichophorum Pers.
- Genus Kuekenthalia Börner accepted as Carex L.
- Genus Kyllinga Rottb. accepted as Cyperus L.
- Genus Kyllingiella R.W.Haines & Lye accepted as Cyperus L.
- Genus Lampocarya R.Br. accepted as Gahnia J.R.Forst. & G.Forst.
- Genus Lamprochlaenia Börner accepted as Carex L.
- Genus Langevinia Jacq.-Fél. accepted as Mapania Aubl.
- Genus Lechleria Phil. accepted as Carex L.
- Genus Leiophyllum Ehrh. accepted as Scirpus Tourn. ex L.
- Genus Lepidospora (F.Muell.) F.Muell. accepted as Schoenus L.
- Genus Lepidotosperma Roem. & Schult. accepted as Lepidosperma Labill.
- Genus Lepisia C.Presl accepted as Tetraria P.Beauv.
- Genus Lepistachya Zipp. ex Miq. accepted as Mapania Aubl.
- Genus Leptolepis Boeckeler accepted as Blysmus Panz. ex Schult.
- Genus Leptoschoenus Nees accepted as Rhynchospora Vahl
- Genus Leptostachys Ehrh. accepted as Carex L.
- Genus Leptovignea Börner accepted as Carex L.
- Genus Lepyronia Rich in Pers. accepted as Lepironia Rich. in Pers.
- Genus Lerisca Schltdl. accepted as Lagenocarpus Nees
- Genus Leucocoma Rydb. accepted as Trichophorum Pers.
- Genus Leucoglochin Heuff. accepted as Carex L.
- Genus Leucoma Ehrh. accepted as Eriophorum L.
- Genus Limivasculum Börner accepted as Carex L.
- Genus Limnocharis Kunth accepted as Eleocharis R.Br.
- Genus Limnochloa P.Beauv. ex T.Lestib. accepted as Eleocharis R.Br.
- Genus Limonaetes Ehrh. accepted as Carex L.
- Genus Linagrostis Guett. accepted as Eriophorum L.
- Genus Lipocarpha R.Br. accepted as Cyperus L.
- Genus Lonchostylis Torr. accepted as Rhynchospora Vahl
- Genus Loncoperis Raf. accepted as Carex L.
- Genus Lophocarpus Link accepted as Schoenus L.
- Genus Lophocarpus Boeckeler accepted as Schoenus L.
- Genus Lophoschoenus Stapf accepted as Costularia C.B.Clarke
- Genus Loxanisa Raf. accepted as Carex L.
- Genus Loxotrema Raf. accepted as Carex L.
- Genus Lyprolepis Steud. accepted as Cyperus L.
- Genus Machaerina Nees accepted as Lepidosperma Labill.
- Genus Macrochaetium Steud. accepted as Tetraria P.Beauv.
- Genus Macrolomia Schrad. ex Nees accepted as Scleria P.J.Bergius
- Genus Malachochaete Nees ex Benth. & Hook.f.
- Genus Malacochaete Nees accepted as Schoenoplectus (Rchb.) Palla
- Genus Manochlaenia Börner accepted as Carex L.
- Genus Mapaniopsis C.B.Clarke accepted as Mapania Aubl.
- Genus Mariscopsis Cherm. accepted as Cyperus L.
- Genus Marisculus Goetgh. accepted as Cyperus L.
- Genus Mariscus Scop. accepted as Cladium P. Browne
- Genus Mariscus Vahl accepted as Cyperus L.
- Genus Mariscus Gaertn. accepted as Cyperus L.
- Genus Mastigloscleria Nees accepted as Scleria P.J.Bergius
- Genus Maukschia Heuff. accepted as Carex L.
- Genus Maximoviczia A.P.Khokhr. accepted as Scirpus Tourn. ex L.
- Genus Maximowicziella A.P.Khokhr. accepted as Scirpus Tourn. ex L.
- Genus Megadenus Raf. accepted as Eleocharis R.Br.
- Genus Megarrhena Schrad. ex Nees accepted as Cyperus L.
- Genus Melachne Schrad. ex Schult. & Schult.f. accepted as Gahnia J.R.Forst. & G.Forst.
- Genus Melancranis Vahl accepted as Ficinia Schrad.
- Genus Melanoschoenos Ség. accepted as Schoenus L.
- Genus Meltrema Raf. accepted as Carex L.
- Genus Microchaeta Rchb. accepted as Rhynchospora Vahl
- Genus Microlepis Schrad. ex Nees accepted as Lagenocarpus Nees
- Genus Micropapyrus Suess. accepted as Rhynchospora Vahl
- Genus Mischospora Boeckeler accepted as Fimbristylis Vahl
- Genus Mitrospora Nees accepted as Rhynchospora Vahl
- Genus Morisia Nees accepted as Rhynchospora Vahl
- Genus Naikia Wad.Khan, Bhuskute & Kahalkar accepted as Diplacrum R.Br.
- Genus Neilreichia Kotula accepted as Carex L.
- Genus Nemocharis Beurl. accepted as Scirpus Tourn. ex L.
- Genus Nemochloa Nees accepted as Rhynchospora Vahl
- Genus Nemum Desv. accepted as Bulbostylis Kunth
- Genus Neolophocarpus E.G.Camus accepted as Schoenus L.
- Genus Neoscirpus Y.N.Lee & Y.C.Oh accepted as Trichophorum Pers.
- Genus Neo-senaea K.Schum. ex H.Pfeiff. accepted as Lagenocarpus Nees
- Genus Neskiza Raf. accepted as Carex L.
- Genus Nomochloa P.Beauv. ex T.Lestib. accepted as Blysmus Panz. ex Schult.
- Genus Nomochloa Nees accepted as Rhynchospora Vahl
- Genus Olamblis Raf. accepted as Carex L.
- Genus Olotrema Raf. accepted as Carex L.
- Genus Omoscleria Nees accepted as Scleria P.J.Bergius
- Genus Oncostylis Nees accepted as Bulbostylis Kunth
- Genus Onkerma Raf. accepted as Carex L.
- Genus Opetiola Gaertn. accepted as Cyperus L.
- Genus Ophryoscleria Nees accepted as Scleria P.J.Bergius
- Genus Oreobolopsis T.Koyama & Guagl. accepted as Trichophorum Pers.
- Genus Oreograstis K.Schum. accepted as Carpha Banks & Sol. ex R.Br.
- Genus Oriophorum Gunn.
- Genus Orobium Schrad. ex Nees accepted as Lagenocarpus Nees
- Genus Osculisa Raf. accepted as Carex L.
- Genus Osmoscleria Lindl.
- Genus Oxycaryum Nees accepted as Cyperus L.
- Genus Pachymitra Nees accepted as Rhynchospora Vahl
- Genus Pandanophyllum Hassk. accepted as Mapania Aubl.
- Genus Papyrus Willd. accepted as Cyperus L.
- Genus Pentasticha Turcz. accepted as Fuirena Rottb.
- Genus Phacellanthus Steud. accepted as Gahnia J.R.Forst. & G.Forst.
- Genus Phaenopyrum Schrad. ex Nees accepted as Lagenocarpus Nees
- Genus Phaeocephalum Ehrh. accepted as Rhynchospora Vahl
- Genus Phaeocephalum Ehrh. ex House
- Genus Phaeolorum Ehrh. accepted as Carex L.
- Genus Phyllostachys Torr. accepted as Carex L.
- Genus Physiglochis Neck. accepted as Carex L.
- Genus Picreus Juss.
- Genus Platylepis Kunth accepted as Cyperus L.
- Genus Pleurachne Schrad. accepted as Ficinia Schrad.
- Genus Pleuranthus Pers. accepted as Dulichium Pers.
- Genus Pleurostachys Brongn. accepted as Rhynchospora Vahl
- Genus Plumaria Heist. ex Fabr. accepted as Eriophorum L.
- Genus Plumaria Bubani accepted as Eriophorum L.
- Genus Pogonostylis Bertol. accepted as Fimbristylis Vahl
- Genus Polyglochin Ehrh. accepted as Carex L.
- Genus Proteocarpus Börner accepted as Carex L.
- Genus Pseudocarex Miq. accepted as Carex L.
- Genus Pseudocyperus Steud. accepted as Fimbristylis Vahl
- Genus Pseudoeverardia Gilly accepted as Cephalocarpus Nees
- Genus Pseudomariscus Rauschert accepted as Cyperus L.
- Genus Psilocarya Torr. accepted as Rhynchospora Vahl
- Genus Psittacoschoenus Nees accepted as Gahnia J.R.Forst. & G.Forst.
- Genus Psyllophora Ehrh. accepted as Carex L.
- Genus Ptacoseia Ehrh. accepted as Carex L.
- Genus Pterachne Schrad. ex Nees accepted as Cyperus L.
- Genus Pterochaete Arn. ex Boeckeler accepted as Rhynchospora Vahl
- Genus Pterocyperus Opiz accepted as Cyperus L.
- Genus Pterogyne Schrad. ex Nees accepted as Cyperus L.
- Genus Pterolepis Schrad. accepted as Schoenoplectus (Rchb.) Palla
- Genus Pteroscleria Nees accepted as Diplacrum R.Br.
- Genus Pterotheca C.Presl accepted as Rhynchospora Vahl
- Genus Pterygolepis Rchb. accepted as Schoenoplectus (Rchb.) Palla
- Genus Ptilanthelium Steud. accepted as Schoenus L.
- Genus Ptilochaeta Nees accepted as Rhynchospora Vahl
- Genus Ptilosciadium Steud. accepted as Rhynchospora Vahl
- Genus Ptychocaryum R.Br. ex Kuntze accepted as Scirpodendron Zipp. ex Kurz
- Genus Pycreus P.Beauv. accepted as Cyperus L.
- Genus Queenslandiella Domin accepted as Cyperus L.
- Genus Raymondiella B.Boivin
- Genus Raynalia Soják accepted as Cyperus L.
- Genus Reigera Opiz accepted as Bolboschoenus (Asch.) Palla
- Genus Remirea Aubl. accepted as Cyperus L.
- Genus Rhaptocalymma Borrer accepted as Carex L.
- Genus Rhaptocalymna
- Genus Rhincospora Gaudich.
- Genus Rhynchopera Börner accepted as Carex L.
- Genus Rhynchopera Link, Klotzsch & Otto
- Genus Rikliella J.Raynal accepted as Cyperus L.
- Genus Schelhammeria Moench accepted as Carex L.
- Genus Schizolepis Schrad. ex Nees accepted as Scleria P.J.Bergius
- Genus Schoenidium Nees accepted as Ficinia Schrad.
- Genus Schoenodendron Engl. accepted as Microdracoides Hua
- Genus Schoenoides O.Seberg accepted as Oreobolus R.Br.
- Genus Schoenopsis P.Beauv. ex T.Lestib. accepted as Tetraria P.Beauv.
- Genus Schoenoxiphium Nees accepted as Carex sect. Schoenoxiphium (Nees) Baill.
- Genus Scirpidiella Rauschert accepted as Isolepis R.Br.
- Genus Scirpidium Nees accepted as Eleocharis R.Br.
- Genus Scirpocyperus Ség. accepted as Bolboschoenus (Asch.) Palla
- Genus Sclerochaetium Nees accepted as Tetraria P.Beauv.
- Genus Seidlia Opiz accepted as Scirpus Tourn. ex L.
- Genus Sickmannia Nees accepted as Ficinia Schrad.
- Genus Sorostachys Steud. accepted as Cyperus L.
- Genus Spermodon P.Beauv. ex T.Lestib. accepted as Rhynchospora Vahl
- Genus Sphaerocyperus Lye accepted as Cyperus L.
- Genus Sphaeromariscus E.G.Camus accepted as Cyperus L.
- Genus Sphaeropus Boeckeler accepted as Scleria P.J.Bergius
- Genus Sphaeroschoenus Nees accepted as Rhynchospora Vahl
- Genus Stenophyllus Raf. accepted as Bulbostylis Kunth
- Genus Streblidia Link accepted as Schoenus L.
- Genus Syntrinema H.Pfeiff. accepted as Rhynchospora Vahl
- Genus Syziganthus Steud. accepted as Gahnia J.R.Forst. & G.Forst.
- Genus Taphrogiton Montandon accepted as Scirpus Tourn. ex L.
- Genus Temnemis Raf. accepted as Carex L.
- Genus Terobera Steud. accepted as Machaerina Vahl
- Genus Tetralepis Steud. accepted as Cyathochaeta Nees
- Genus Tetrariopsis C.B.Clarke accepted as Tetraria P.Beauv.
- Genus Thoracostachyum Kurz accepted as Mapania Aubl.
- Genus Thrycocephalum Steud.
- Genus Thryocephalon J.R.Forst. & G.Forst. accepted as Cyperus L.
- Genus Thysanocarex Börner accepted as Carex L.
- Genus Tonduzia Boeckeler accepted as Scleria P.J.Bergius
- Genus Torreya Raf. accepted as Cyperus L.
- Genus Torulinium Desv. accepted as Cyperus L.
- Genus Trachylomia Nees accepted as Scleria P.J.Bergius
- Genus Trachyrhynchium Nees accepted as Machaerina Vahl
- Genus Trasis P.Beauv. ex T.Lestib. accepted as Cladium P. Browne
- Genus Trasus Gray accepted as Carex L.
- Genus Trentepohlia Boeckeler accepted as Cyperus L.
- Genus Trichelostylis T.Lestib. accepted as Fimbristylis Vahl
- Genus Trichoballia C.Presl accepted as Tetraria P.Beauv.
- Genus Trichochaeta Steud. accepted as Rhynchospora Vahl
- Genus Trichophyllum Ehrh. accepted as Eleocharis R.Br.
- Genus Tringa Roxb.
- Genus Triodon Rich. accepted as Rhynchospora Vahl
- Genus Triodus Raf.
- Genus Tryocephalum Endl.
- Genus Tunga Roxb. accepted as Hypolytrum Pers.
- Genus Tylocarya Nelmes accepted as Fimbristylis Vahl
- Genus Ulea-flos C.B.Clarke ex H.Pfeiff. accepted as Lagenocarpus Nees
- Genus Ulva Adans. accepted as Carex L.
- Genus Ulva Haller
- Genus Uncinia Pers. accepted as Carex L.
- Genus Ungeria Nees ex C.B.Clarke accepted as Cyperus L.
- Genus Vaginaria Pers. accepted as Fuirena Rottb.
- Genus Vauthiera A.Rich. accepted as Lepidosperma Labill.
- Genus Vesicarex Steyerm. accepted as Carex L.
- Genus Vignantha Schur accepted as Carex L.
- Genus Vignea P.Beauv. ex T.Lestib. accepted as Carex L.
- Genus Vignidula Börner accepted as Carex L.
- Genus Vincentia Gaudich. accepted as Machaerina Vahl
- Genus Voladeria Benoist accepted as Oreobolus R.Br.
- Genus Volkiella Merxm. & Czech accepted as Cyperus L.
- Genus Websteria S.H.Wright accepted as Eleocharis R.Br.
- Genus Zosterospermon P.Beauv. ex T.Lestib. accepted as Rhynchospora Vahl