Cyperaceae taxon details
Cyperus diffusus Vahl
1680733 (urn:lsid:marinespecies.org:taxname:1680733)
accepted
Species
Carex diffusus Vahl · unaccepted (Lapsus)
Cyperus holophyllus var. celebica Miq. · unaccepted
Eucyperus diffusus (Vahl) Rikli · unaccepted
- Variety Cyperus diffusus var. diffusus Vahl
- Variety Cyperus diffusus var. latifolius L.K.Dai
- Variety Cyperus diffusus var. umbrosus Kük. (uncertain > unassessed)
- Forma Cyperus diffusus f. turgidulus Valck.Sur. accepted as Cyperus trialatus (Boeckeler) J.Kern
- Variety Cyperus diffusus var. brevibracteatus (E.G.Camus) Kük. accepted as Cyperus diffusus var. diffusus Vahl
- Variety Cyperus diffusus var. celebicus (Miq.) Kük. accepted as Cyperus diffusus var. diffusus Vahl
- Variety Cyperus diffusus var. chalaranthus (J.Presl & C.Presl) C.B.Clarke accepted as Cyperus chalaranthus J.Presl & C.Presl
- Variety Cyperus diffusus var. chorisanthos (C.B.Clarke) C.B.Clarke accepted as Cyperus diffusus var. chorisanthus (C.B.Clarke) Kük. accepted as Cyperus chorisanthus C.B.Clarke (orthographic variant)
- Variety Cyperus diffusus var. chorisanthus (C.B.Clarke) Kük. accepted as Cyperus chorisanthus C.B.Clarke
- Variety Cyperus diffusus var. macrostachyus Boeckeler accepted as Cyperus diffusus var. diffusus Vahl
- Variety Cyperus diffusus var. multispicatus S.M.Huang accepted as Cyperus diffusus var. diffusus Vahl
- Variety Cyperus diffusus var. pubisquama (Steud.) Kük. accepted as Cyperus diffusus var. diffusus Vahl
- Variety Cyperus diffusus var. tolucensis (Kunth) Kük. accepted as Cyperus laxus Lam.
- Variety Cyperus diffusus var. umbrosus (Lindl. & Nees) Kük. accepted as Cyperus laxus Lam.
terrestrial
Not documented
Description Perennials. Rhizomes short, hardened. Culms 25-80 cm tall, slightly thick, triquetrous, smooth, several leaved at basal...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Enum. Pl. Obs. 2: 321 1805 to Enum. Pl. Obs. 2: 321 (1805),...
Description Perennials. Rhizomes short, hardened. Culms 25-80 cm tall, slightly thick, triquetrous, smooth, several leaved at basal part. Leaves equaling or shorter than culm; sheath pale green and eventually reddish brown; leaf blade 0.3-2 cm wide, flat, margin scabrous. Involucral bracts 6-12, leaflike, longer than inflorescence, 0.6-1.6(-1.9) cm wide. Inflorescence a decompound anthela; rays many, mostly 12-16 cm, each with 2-8 raylets. Spikelets 1-5, sessile, sometimes more than 3 at apex of raylets or tertiary raylets, oblong to linear-oblong, 3-7(-14) × 1.5-2 mm, slightly turgid, 6-12(-22)-flowered; rachilla narrowly winged. Glumes reddish brown or rusty brown on both surfaces but middle abaxially green or grayish green, lax, broadly ovate to orbicular-ovate, ca. 2 mm, 7-11-veined, keel prominent, apex rounded and with recurved mucro. Stamens 3; anthers linear, apex with white setae. Style very short; stigmas 3. Nutlet dark brown, ellipsoid, ca. 3/4 as long as subtending glume, 3-sided. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Enum. Pl. Obs. 2: 321 1805 to Enum. Pl. Obs. 2: 321 (1805),...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Enum. Pl. Obs. 2: 321 1805 to Enum. Pl. Obs. 2: 321 (1805), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Cyperus diffusus Vahl. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680733 on 2026-01-15
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
basis of record
Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
Other
additional source
Li, B. Z.; Zhang, S. R. (2024). An updated species checklist and taxonomic synopsis of Cyperaceae in China. <em>Biodiversity Science.</em> 32(7): 24106., available online at https://doi.org/10.17520/biods.2024106 [details] Available for editors 
[request]
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Perennials. Rhizomes short, hardened. Culms 25-80 cm tall, slightly thick, triquetrous, smooth, several leaved at basal part. Leaves equaling or shorter than culm; sheath pale green and eventually reddish brown; leaf blade 0.3-2 cm wide, flat, margin scabrous. Involucral bracts 6-12, leaflike, longer than inflorescence, 0.6-1.6(-1.9) cm wide. Inflorescence a decompound anthela; rays many, mostly 12-16 cm, each with 2-8 raylets. Spikelets 1-5, sessile, sometimes more than 3 at apex of raylets or tertiary raylets, oblong to linear-oblong, 3-7(-14) × 1.5-2 mm, slightly turgid, 6-12(-22)-flowered; rachilla narrowly winged. Glumes reddish brown or rusty brown on both surfaces but middle abaxially green or grayish green, lax, broadly ovate to orbicular-ovate, ca. 2 mm, 7-11-veined, keel prominent, apex rounded and with recurved mucro. Stamens 3; anthers linear, apex with white setae. Style very short; stigmas 3. Nutlet dark brown, ellipsoid, ca. 3/4 as long as subtending glume, 3-sided. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Enum. Pl. Obs. 2: 321 1805 to Enum. Pl. Obs. 2: 321 (1805), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (152 publications)
To European Nucleotide Archive, ENA (Cyperus diffusus)
To International Plant Names Index (IPNI) (from synonym Eucyperus diffusus (Vahl) Rikli)
To International Plant Names Index (IPNI)
To IUCN Red List (Least Concern)
To Plants of the World Online
To Plants of the World Online (from synonym Eucyperus diffusus (Vahl) Rikli)
To Royal Botanic Gardens, Kew (Cyperus diffusus K000362644 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000922446 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000959000 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000959007 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000959008 type 1)
To The Plant List (from synonym Carex diffusus Vahl)
To The Plant List (from synonym Cyperus holophyllus var. celebica Miq.)
To European Nucleotide Archive, ENA (Cyperus diffusus)
To International Plant Names Index (IPNI) (from synonym Eucyperus diffusus (Vahl) Rikli)
To International Plant Names Index (IPNI)
To IUCN Red List (Least Concern)
To Plants of the World Online
To Plants of the World Online (from synonym Eucyperus diffusus (Vahl) Rikli)
To Royal Botanic Gardens, Kew (Cyperus diffusus K000362644 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000922446 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000959000 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000959007 type 1)
To the Natural History Museum, London (Cyperus diffusus Vahl BM000959008 type 1)
To The Plant List (from synonym Carex diffusus Vahl)
To The Plant List (from synonym Cyperus holophyllus var. celebica Miq.)
From editor or global species database
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