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Cyperaceae taxon details

Eleocharis nigrescens (Nees) Kunth

Eleocharis nigrescens
Eleocharis nigrescens

1680507 (urn:lsid:marinespecies.org:taxname:1680507)

  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. Cyperoideae (Subfamily)
  12. Eleocharideae (Tribe)
  13. Eleocharis (Genus)
  14. Eleocharis nigrescens (Species)
accepted
Species

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terrestrial
(of Scirpidium nigrescens Nees) Nees von Esenbeck, C. G. D. (1842). Cyperographia sive descriptio Cyperacearum in Brasilia provenientum. <em>Florae Brasiliensis.</em> 2(1)., available online at https://www.biodiversitylibrary.org/page/134898#page/6/mode/1up
page(s): 97 [details] 
Description Plants usually annual, tufted, not stoloniferous; rhizomes absent. Culms sometimes ascending, subterete, elliptic, or...  
Description Plants usually annual, tufted, not stoloniferous; rhizomes absent. Culms sometimes ascending, subterete, elliptic, or polygonal, (1–)3–7.5(–9) cm × 0.2–0.5 mm, very soft. Leaves: distal leaf sheaths persistent or disintegrating, colorless, stramineous or green, spotted red-brown to purple, membranous, apex narrowly acute. Spikelets: basal spikelets absent; never proliferous, ovoid or ellipsoid, terete, 2–4.7(–8.5) × 1–2 mm, apex acute to blunt; proximal scale empty or with flower, persistent, clasping 1/2 of culm, similar to floral scales (but 1.1–1.7 mm, midrib region broadly green); subproximal scale with a flower; floral scales spiraled, 10–30(–100), 10–16 per mm of rachilla, colorless, whitish, or pale brown, mottled red-brown to purple, midribs pale brown or green, ovate or elliptic, 1–1.2 × 0.45–0.6 mm, membranous, midrib prominent, apex rounded. Flowers: perianth absent; stamens 1; anthers 0.2–0.3 mm; styles 3-fid. Achenes colorless (appearing green-brown from enclosed seed) or whitish, sometimes spotted red-brown, obovoid, trigonous, angles prominent, 0.5–0.6 × 0.33–0.4 mm, apex constricted proximal to tubercle, smooth. Tubercles white, gray or pale brown, pyramidal or umbonate, trigonous, 0.1–0.15 × 0.15–0.2 mm. [details]

Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from (Nees) Kunth to Kunth, information provided by Alan E. on...  
Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from (Nees) Kunth to Kunth, information provided by Alan E. on email Oct. 12 2020 More details could be found in The Plant List v.1.1. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Eleocharis nigrescens (Nees) Kunth. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680507 on 2026-09-16
Date
action
by
2023-09-06 07:35:01Z
created
Larridon, Isabel
2024-12-10 11:47:54Z
unchecked
db_admin
2025-10-07 09:13:11Z
checked
Marco Rosado, Nuria

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Nomenclature

original description (of Scirpidium nigrescens Nees) Nees von Esenbeck, C. G. D. (1842). Cyperographia sive descriptio Cyperacearum in Brasilia provenientum. <em>Florae Brasiliensis.</em> 2(1)., available online at https://www.biodiversitylibrary.org/page/134898#page/6/mode/1up
page(s): 97 [details] 

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

new combination reference Kunth, C. S. (1837). Enumeratio Plantarum Omnium Hucusque Cognitarum, Secundum Familias Naturales Disposita, Adjectis Characteribus, Differentiis et Synonymis. Vol 2. Cyperographia synoptica sive enumeratio Cyperacearum omnium hucusque cognitarum. Stuttgart: Germany., available online at https://www.biodiversitylibrary.org/page/7428301#page/9/mode/1up
page(s): 157 [details] 

 
 Present  Inaccurate  Introduced: alien  Containing type locality 
   

Isotype (of Scirpidium nigrescens Nees) K 000189276, geounit Brazil [details]
From editor or global species database
Description Plants usually annual, tufted, not stoloniferous; rhizomes absent. Culms sometimes ascending, subterete, elliptic, or polygonal, (1–)3–7.5(–9) cm × 0.2–0.5 mm, very soft. Leaves: distal leaf sheaths persistent or disintegrating, colorless, stramineous or green, spotted red-brown to purple, membranous, apex narrowly acute. Spikelets: basal spikelets absent; never proliferous, ovoid or ellipsoid, terete, 2–4.7(–8.5) × 1–2 mm, apex acute to blunt; proximal scale empty or with flower, persistent, clasping 1/2 of culm, similar to floral scales (but 1.1–1.7 mm, midrib region broadly green); subproximal scale with a flower; floral scales spiraled, 10–30(–100), 10–16 per mm of rachilla, colorless, whitish, or pale brown, mottled red-brown to purple, midribs pale brown or green, ovate or elliptic, 1–1.2 × 0.45–0.6 mm, membranous, midrib prominent, apex rounded. Flowers: perianth absent; stamens 1; anthers 0.2–0.3 mm; styles 3-fid. Achenes colorless (appearing green-brown from enclosed seed) or whitish, sometimes spotted red-brown, obovoid, trigonous, angles prominent, 0.5–0.6 × 0.33–0.4 mm, apex constricted proximal to tubercle, smooth. Tubercles white, gray or pale brown, pyramidal or umbonate, trigonous, 0.1–0.15 × 0.15–0.2 mm. [details]

Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from (Nees) Kunth to Kunth, information provided by Alan E. on email Oct. 12 2020 More details could be found in The Plant List v.1.1. [details]
    Definitions

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To Biodiversity Heritage Library (1 publication) (from synonym Eleocharis perrieri Cherm.)
To Biodiversity Heritage Library (1 publication) (from synonym Isolepis nigrescens (Nees) Steud.)
To Biodiversity Heritage Library (17 publications) (from synonym Scirpidium nigrescens Nees)
To Biodiversity Heritage Library (27 publications) 
To Biodiversity Heritage Library (4 publications) (from synonym Scirpus nigrescens (Nees) Salzm. ex Steud.)
To European Nucleotide Archive, ENA (Eleocharis nigrescens) 
To GenBank (3 nucleotides; 2 proteins) 
To International Plant Names Index (IPNI) 
To International Plant Names Index (IPNI) (from synonym Eleocharis hildebrandtii Boeckeler)
To International Plant Names Index (IPNI) (from synonym Isolepis nigrescens (Nees) Steud.)
To International Plant Names Index (IPNI) (from synonym Scirpidium nigrescens Nees)
To International Plant Names Index (IPNI) (from synonym Eleocharis perrieri Cherm.)
To International Plant Names Index (IPNI) (from synonym Scirpus nigrescens (Nees) Salzm. ex Steud.)
To IUCN Red List (Least Concern) 
To Plants of the World Online (from synonym Eleocharis hildebrandtii Boeckeler)
To Plants of the World Online 
To Plants of the World Online (from synonym Eleocharis perrieri Cherm.)
To Plants of the World Online (from synonym Isolepis nigrescens (Nees) Steud.)
To Plants of the World Online (from synonym Scirpidium nigrescens Nees)
To Plants of the World Online (from synonym Scirpus nigrescens (Nees) Salzm. ex Steud.)
To Royal Botanic Gardens, Kew (Eleocharis hildebrandtii K000416637 type 1) (from synonym Eleocharis hildebrandtii Boeckeler)
To Royal Botanic Gardens, Kew (Scirpidium nigrescens K000189276 type 1) (from synonym Scirpidium nigrescens Nees)
To Royal Botanic Gardens, Kew (Scirpidium nigrescens K000189277 isotype 1) (from synonym Scirpidium nigrescens Nees)
From editor or global species database
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