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Cyperaceae taxon details

Isolepis fluitans (L.) R.Br.

To the Natural History Museum, London (Isolepis fluitans (L.) R.Br. BM000798971 type 1)
To the Natural History Museum, London (Isolepis fluitans (L.) R.Br. BM000798971 type 1)

1679371  (urn:lsid:marinespecies.org:taxname:1679371)

  1. Biota
  2. Plantae (Kingdom)
  3. Viridiplantae (Subkingdom)
  4. Streptophyta (Infrakingdom)
  5. Tracheophyta (Phylum (Division))
  6. Spermatophytina (Subphylum (Subdivision))
  7. Magnoliopsida (Class)
  8. Lilianae (Superorder)
  9. Poales (Order)
  10. Cyperaceae (Family)
  11. Cypereae (Tribe)
  12. Ficiniinae (Subtribe)
  13. Isolepis (Genus)
  14. Isolepis fluitans (Species)
accepted
Species

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marine, brackish, fresh, terrestrial
recent only
Brown, R. (1810). Prodromus florae Novae Hollandiae et Insulae Van-Diemen, exhibens characteres plantarum quas annis 1802-1805 per oras utriusque insulae collegit et descripsit Robertus Brown; insertis passim aliis speciebus auctori hucusque cognitis, seu evulgatis, seu ineditis, praesertim Banksianis, in primo itinere navarchi Cook detectis. Vol. 1 pp. [i]-viii, 145-590 p., [1] h. ["Addenda"]. Londini [London]: typis Richardi Taylori et Scoii. Veneunt apud J. Johnson et Socios, in Caementerio Sancti Pauli., available online at https://www.biodiversitylibrary.org/page/6157371
page(s): 221 [details] 

(of Scirpus fluitans L.) Linnaeus, C. (1753). Species plantarum, exhibentes plantas rite cognitas ad genera relatas cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Vol 1. Salvius, Stockholm., available online at https://www.biodiversitylibrary.org/page/358012
page(s): 47 [details] 
Description Rhizomes perennial but short-lived, or often only annual, ascending or horizontal, usually floating or submerged, rarely...  
Description Rhizomes perennial but short-lived, or often only annual, ascending or horizontal, usually floating or submerged, rarely terrestrial; leafless sheaths absent. Stems 1–50(–130) cm × 0.2–1.1 mm, compressed, pale greenish-yellow, often repeatedly branched, with one or more internodes from which culms or leaves arise; culms 1–19 cm × 0.2–0.9 mm. Leaves up to 10 cm × 0.2–2 mm, flat in cross-section; sheath 3–25 × 0.3–1.7 mm, green or brown; ligule absent. Inflorescence a solitary terminal spikelet; peduncles up to 10 cm, terete below, trigonous above; involucral bracts 2–8 × 0.3–1.3 mm, glume-like. Spikelet 2.4–9.4 × 1.5–3.4 × 0.7–2.7 mm, with 4–12(–28) glumes. Glumes 0.5–1.3 mm, acute to obtuse, green or with scarious or brown patches; midrib green, with mucro < 0.1 mm long. Flowers bisexual; perianth bristles 0; stamens 2–3; anthers 0.4–1.5 mm, crested; stigmas 2(–3). Nuts 0.9–1.8 × 0.5–1.2 mm, 2- to 3-sided, brown; surface minutely reticulate. [details]

Description Perenne. Tallos 10–70(100) cm × ~0,2–0,5 mm, enraizantes en los nudos, flotantes o postrado-ascendentes, ramificados,...  
Description Perenne. Tallos 10–70(100) cm × ~0,2–0,5 mm, enraizantes en los nudos, flotantes o postrado-ascendentes, ramificados, subcilíndricos o ± comprimidos. Hojas caulinares, con lámina hasta de 10 cm. Inflorescencia en espiguilla solitaria, ebracteada, que se dispone en el extremo de un largo pedúnculo que nace de la axila de las hojas; espiguillas 2,5–5 × 1,5–2 mm, ovoides, con 3–11 flores. Glumas 1,5–3 × 1–1,5 mm, ovadas, más o menos hialinas, con el nervio central verde, con 7–11 nervios. Estambres (2)3; anteras 0,8–1,6 mm, amarillas. Estilo con 2 estigmas. Aquenios 0,9–1,5 × 0,6–0,8 mm, de contorno obovado a elíptico, plano-convexos o estrechamente biconvexos, con márgenes agudos, lisos, de color pardo muy claro, verdosos o pajizos. [details]

Description Mat-forming annual or short-lived perennial. Roots minute; rhizome 4–30 × 0.3–1.2 mm, horizontal, green and above...  
Description Mat-forming annual or short-lived perennial. Roots minute; rhizome 4–30 × 0.3–1.2 mm, horizontal, green and above ground. Culms 1–47 cm tall, 0.2–1.1 mm in diameter, with one or more internodes; peduncle 1–19 cm tall, 0.2–0.9 mm in diameter. Leaves: sheath 3–25 × 0.3–1.7 mm, green or brown; blade 2–80 × 0.2–1.1 mm. Inflorescence terminal, not proliferating; bract 2–12 × 0.3–1.3 mm. Spikelet solitary, 2.4–9.4 × 0.7–2.7 mm, with 4–28 glumes. Glumes 1.5–3.4 × 0.5–1.3 mm, acute to obtuse, green or with brown patches, midrib green with mucro <0.1 mm long. Style bifid. Stamens 2–3; anthers 0.4–1.5 mm long, crested. Nutlets 0.9–1.8 × 0.5–1.2 mm, brown, minutely reticulate. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from Prodr. Fl. Nov. Holl. 221 1810 to Prodr. Fl. Nov. Holland. : 221...  
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Prodr. Fl. Nov. Holl. 221 1810 to Prodr. Fl. Nov. Holland. : 221 (1810), 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. Isolepis fluitans (L.) R.Br.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1679371 on 2026-01-10
Date
action
by
2023-09-06 07:35:01Z
created
Larridon, Isabel
2024-12-10 11:47:54Z
unchecked
db_admin
2025-04-19 13:33:59Z
changed
Wilson, Karen L.

Creative Commons License The webpage text is licensed under a Creative Commons Attribution 4.0 License


Nomenclature

original description Brown, R. (1810). Prodromus florae Novae Hollandiae et Insulae Van-Diemen, exhibens characteres plantarum quas annis 1802-1805 per oras utriusque insulae collegit et descripsit Robertus Brown; insertis passim aliis speciebus auctori hucusque cognitis, seu evulgatis, seu ineditis, praesertim Banksianis, in primo itinere navarchi Cook detectis. Vol. 1 pp. [i]-viii, 145-590 p., [1] h. ["Addenda"]. Londini [London]: typis Richardi Taylori et Scoii. Veneunt apud J. Johnson et Socios, in Caementerio Sancti Pauli., available online at https://www.biodiversitylibrary.org/page/6157371
page(s): 221 [details] 

original description (of Scirpus fluitans L.) Linnaeus, C. (1753). Species plantarum, exhibentes plantas rite cognitas ad genera relatas cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas. Vol 1. Salvius, Stockholm., available online at https://www.biodiversitylibrary.org/page/358012
page(s): 47 [details] 

basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details] 

new combination reference Brown, R. (1810). Prodromus florae Novae Hollandiae et Insulae Van-Diemen, exhibens characteres plantarum quas annis 1802-1805 per oras utriusque insulae collegit et descripsit Robertus Brown; insertis passim aliis speciebus auctori hucusque cognitis, seu evulgatis, seu ineditis, praesertim Banksianis, in primo itinere navarchi Cook detectis. Vol. 1 pp. [i]-viii, 145-590 p., [1] h. ["Addenda"]. Londini [London]: typis Richardi Taylori et Scoii. Veneunt apud J. Johnson et Socios, in Caementerio Sancti Pauli., available online at https://www.biodiversitylibrary.org/page/6157371
page(s): 221 [details] 

Taxonomy

taxonomy source Jermy, A.C.; Simpson, D.A.; Foley, M.J.Y.; Porter, M.S. (2007). Sedges of the British Isles. 554 pp. Botanical Society of Britain & Ireland, United Kingdom. [details] Available for editors  PDF available [request]

Other

additional source Luceño, M., Castroviejo, S., Jiménez-Mejías, P. (2008). Cyperaceae. In: Castroviejo, Luceño, M., Galán, A., Jiménez-Mejías, P., Cabezas, F., Medina, L. (eds). Flora iberica. Plantas vasculares de la Península Ibérica e Islas Baleares. Vol. XVIII. Madrid: CSIC., available online at https://bibdigital.rjb.csic.es/records/item/12958-flora-iberica-vol-18-cyperaceae-pontederiaceae?offset=, http://www.floraiberica.es/PHP/familias_lista_.php?familia=Cyperaceae [details] 

 
 Present  Inaccurate  Introduced: alien  Containing type locality 
   

From editor or global species database
Description Rhizomes perennial but short-lived, or often only annual, ascending or horizontal, usually floating or submerged, rarely terrestrial; leafless sheaths absent. Stems 1–50(–130) cm × 0.2–1.1 mm, compressed, pale greenish-yellow, often repeatedly branched, with one or more internodes from which culms or leaves arise; culms 1–19 cm × 0.2–0.9 mm. Leaves up to 10 cm × 0.2–2 mm, flat in cross-section; sheath 3–25 × 0.3–1.7 mm, green or brown; ligule absent. Inflorescence a solitary terminal spikelet; peduncles up to 10 cm, terete below, trigonous above; involucral bracts 2–8 × 0.3–1.3 mm, glume-like. Spikelet 2.4–9.4 × 1.5–3.4 × 0.7–2.7 mm, with 4–12(–28) glumes. Glumes 0.5–1.3 mm, acute to obtuse, green or with scarious or brown patches; midrib green, with mucro < 0.1 mm long. Flowers bisexual; perianth bristles 0; stamens 2–3; anthers 0.4–1.5 mm, crested; stigmas 2(–3). Nuts 0.9–1.8 × 0.5–1.2 mm, 2- to 3-sided, brown; surface minutely reticulate. [details]

Description Perenne. Tallos 10–70(100) cm × ~0,2–0,5 mm, enraizantes en los nudos, flotantes o postrado-ascendentes, ramificados, subcilíndricos o ± comprimidos. Hojas caulinares, con lámina hasta de 10 cm. Inflorescencia en espiguilla solitaria, ebracteada, que se dispone en el extremo de un largo pedúnculo que nace de la axila de las hojas; espiguillas 2,5–5 × 1,5–2 mm, ovoides, con 3–11 flores. Glumas 1,5–3 × 1–1,5 mm, ovadas, más o menos hialinas, con el nervio central verde, con 7–11 nervios. Estambres (2)3; anteras 0,8–1,6 mm, amarillas. Estilo con 2 estigmas. Aquenios 0,9–1,5 × 0,6–0,8 mm, de contorno obovado a elíptico, plano-convexos o estrechamente biconvexos, con márgenes agudos, lisos, de color pardo muy claro, verdosos o pajizos. [details]

Description Mat-forming annual or short-lived perennial. Roots minute; rhizome 4–30 × 0.3–1.2 mm, horizontal, green and above ground. Culms 1–47 cm tall, 0.2–1.1 mm in diameter, with one or more internodes; peduncle 1–19 cm tall, 0.2–0.9 mm in diameter. Leaves: sheath 3–25 × 0.3–1.7 mm, green or brown; blade 2–80 × 0.2–1.1 mm. Inflorescence terminal, not proliferating; bract 2–12 × 0.3–1.3 mm. Spikelet solitary, 2.4–9.4 × 0.7–2.7 mm, with 4–28 glumes. Glumes 1.5–3.4 × 0.5–1.3 mm, acute to obtuse, green or with brown patches, midrib green with mucro <0.1 mm long. Style bifid. Stamens 2–3; anthers 0.4–1.5 mm long, crested. Nutlets 0.9–1.8 × 0.5–1.2 mm, brown, minutely reticulate. [details]

Taxonomic remark Source in seed data: wcs Update namepublishedIn from Prodr. Fl. Nov. Holl. 221 1810 to Prodr. Fl. Nov. Holland. : 221 (1810), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]

Translation Perennial. Stems 10–70(100) cm long and about 0.2–0.5 mm thick, rooting at the nodes, floating or prostrate-ascending, branched, subcylindrical or somewhat compressed. Cauline leaves with a blade up to 10 cm long. Inflorescence consisting of a solitary spikelet, without bracts, borne at the tip of a long peduncle arising from the leaf axils; spikelets 2.5–5 × 1.5–2 mm, ovoid, with 3–11 flowers. Glumes 1.5–3 × 1–1.5 mm, ovate, more or less hyaline, with a green central nerve and 7–11 veins. Stamens (2)3; anthers 0.8–1.6 mm long, yellow. Style with 2 stigmas. Achenes 0.9–1.5 × 0.6–0.8 mm, obovate to elliptical in outline, plano-convex or narrowly biconvex, with sharp margins, smooth, very pale brown, greenish or straw-coloured. [details]
    Definitions

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To Biodiversity Heritage Library (1 publication) (from synonym Cyperus fluitans (L.) Missbach & E.H.L.Krause)
To Biodiversity Heritage Library (13 publications) (from synonym Heleogiton fluitans (L.) Link ex Rchb.)
To Biodiversity Heritage Library (148 publications) 
To Biodiversity Heritage Library (27 publications) (from synonym Eleocharis fluitans (L.) Hook.)
To Biodiversity Heritage Library (3 publications) (from synonym Schoenoplectus fluitans (L.) Palla)
To Biodiversity Heritage Library (31 publications) (from synonym Dichostylis fluitans (L.) Rchb.)
To Biodiversity Heritage Library (4 publications) (from synonym Clavula fluitans (L.) Dumort.)
To Biodiversity Heritage Library (523 publications) (from synonym Scirpus fluitans L.)
To Biodiversity Heritage Library (73 publications) (from synonym Eleogiton fluitans (L.) Link)
To European Nucleotide Archive, ENA (Isolepis fluitans) 
To GenBank (70 nucleotides; 7 proteins) 
To GenBank (70 nucleotides; 7 proteins) (from synonym Eleogiton fluitans (L.) Link)
To International Plant Names Index (IPNI) (from synonym Eleogiton fluitans (L.) Link)
To International Plant Names Index (IPNI) (from synonym Dichostylis fluitans (L.) Rchb.)
To International Plant Names Index (IPNI) (from synonym Eleocharis fluitans (L.) Hook.)
To International Plant Names Index (IPNI) (from synonym Scirpidiella fluitans (L.) Rauschert)
To International Plant Names Index (IPNI) (from synonym Heleogiton fluitans (L.) Link ex Rchb.)
To International Plant Names Index (IPNI) (from synonym Schoenoplectus fluitans (L.) Palla)
To International Plant Names Index (IPNI) 
To International Plant Names Index (IPNI) (from synonym Clavula fluitans (L.) Dumort.)
To International Plant Names Index (IPNI) (from synonym Cyperus fluitans (L.) Missbach & E.H.L.Krause)
To International Plant Names Index (IPNI) (from synonym Scirpus fluitans L.)
To IUCN Red List (Least Concern) 
To Plants of the World Online (from synonym Clavula fluitans (L.) Dumort.)
To Plants of the World Online 
To Plants of the World Online (from synonym Cyperus fluitans (L.) Missbach & E.H.L.Krause)
To Plants of the World Online (from synonym Eleocharis fluitans (L.) Hook.)
To Plants of the World Online (from synonym Dichostylis fluitans (L.) Rchb.)
To Plants of the World Online (from synonym Schoenoplectus fluitans (L.) Palla)
To Plants of the World Online (from synonym Scirpus fluitans L.)
To Plants of the World Online (from synonym Scirpidiella fluitans (L.) Rauschert)
To Plants of the World Online (from synonym Eleogiton fluitans (L.) Link)
To Plants of the World Online (from synonym Heleogiton fluitans (L.) Link ex Rchb.)
To the Natural History Museum, London (Isolepis fluitans (L.) R.Br. BM000798971 type 1) 
To the Natural History Museum, London (Isolepis fluitans (L.) R.Br. BM000798972 type 1) 
To The Plant List (from synonym Scirpus fluitans var. fluitans L.)
To The Plant List (from synonym Scirpus fluitans var. spadicea C.B.Clarke)
From editor or global species database
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