Cyperaceae taxon details
Eleocharis fallax Weath.
1681087 (urn:lsid:marinespecies.org:taxname:1681087)
accepted
Species
Eleocharis ambigens Fernald · unaccepted
Eleocharis nervosa Kük. · unaccepted
terrestrial
Not documented
Description Plants perennial, mat-forming; rhizomes evident, long, 1–2 mm thick, firm, cortex persistent, longer internodes...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 24: 23 1922 to Rhodora 24: 23 (1922), information provided by...
Description Plants perennial, mat-forming; rhizomes evident, long, 1–2 mm thick, firm, cortex persistent, longer internodes 5–10(–20) mm, scales sometimes fugaceous, 5–7 mm, papery (to membranous), sometimes fibrous. Culms terete, often with to 12 blunt ridges when dry, 30–75 cm × 0.5–1.5 mm, firm, internally spongy. Leaves: distal leaf sheaths persistent, not splitting, proximally dark red, distally stramineous or green, papery to membranous, apex dark red brown, obtuse, not callose, tooth rarely present on some culms, 0.2 mm. Spikelets ovoid or subspheric, 5–12 × 2–3(–4) mm, apex acute to obtuse; proximal scale amplexicaulous, entire; subproximal scale with flower; floral scales deciduous, often spreading in fruit, 10–35, 3 per mm of rachilla, red-brown to blackish brown, midrib regions sometimes green, ovate, 2.5–3 × 1.7 mm, apex entire, obtuse to acute, often carinate in distal part of spikelet. Flowers: perianth bristles 1–5, brown, stout, very unequal, rudimentary to equaling achene; stamens unknown [absent from specimens]; styles 3-fid or some 2-fid. Achenes not persistent, dark yellow or medium brown, obovoid to obpyriform, compressed trigonous, or some thickly biconvex, angles evident, 1.1–1.5 × 0.95–1.25 mm, apex rounded, neck very short (to absent), finely rugulose at 10–20X, 20 or more horizontal ridges in vertical series, finely cancellate at 20–30X. Tubercles whitish to brown, pyramidal, not depressed, as high as wide, 0.3–0.5 × 0.4–0.6 mm. 2n = 42. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 24: 23 1922 to Rhodora 24: 23 (1922), information provided by...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 24: 23 1922 to Rhodora 24: 23 (1922), information provided by Alan E. on email Jun. 07 2021 More details could be found in The Pla [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Eleocharis fallax Weath.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681087 on 2025-09-12
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Attribution 4.0 License
Nomenclature
basis of record
Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Plants perennial, mat-forming; rhizomes evident, long, 1–2 mm thick, firm, cortex persistent, longer internodes 5–10(–20) mm, scales sometimes fugaceous, 5–7 mm, papery (to membranous), sometimes fibrous. Culms terete, often with to 12 blunt ridges when dry, 30–75 cm × 0.5–1.5 mm, firm, internally spongy. Leaves: distal leaf sheaths persistent, not splitting, proximally dark red, distally stramineous or green, papery to membranous, apex dark red brown, obtuse, not callose, tooth rarely present on some culms, 0.2 mm. Spikelets ovoid or subspheric, 5–12 × 2–3(–4) mm, apex acute to obtuse; proximal scale amplexicaulous, entire; subproximal scale with flower; floral scales deciduous, often spreading in fruit, 10–35, 3 per mm of rachilla, red-brown to blackish brown, midrib regions sometimes green, ovate, 2.5–3 × 1.7 mm, apex entire, obtuse to acute, often carinate in distal part of spikelet. Flowers: perianth bristles 1–5, brown, stout, very unequal, rudimentary to equaling achene; stamens unknown [absent from specimens]; styles 3-fid or some 2-fid. Achenes not persistent, dark yellow or medium brown, obovoid to obpyriform, compressed trigonous, or some thickly biconvex, angles evident, 1.1–1.5 × 0.95–1.25 mm, apex rounded, neck very short (to absent), finely rugulose at 10–20X, 20 or more horizontal ridges in vertical series, finely cancellate at 20–30X. Tubercles whitish to brown, pyramidal, not depressed, as high as wide, 0.3–0.5 × 0.4–0.6 mm. 2n = 42. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Rhodora 24: 23 1922 to Rhodora 24: 23 (1922), information provided by Alan E. on email Jun. 07 2021 More details could be found in The Pla [details]
To Biodiversity Heritage Library (13 publications) (from synonym Eleocharis ambigens Fernald)
To Biodiversity Heritage Library (2 publications) (from synonym Eleocharis nervosa Kük.)
To Biodiversity Heritage Library (21 publications)
To European Nucleotide Archive, ENA (Eleocharis fallax)
To GenBank (3 nucleotides; 2 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Eleocharis ambigens Fernald)
To International Plant Names Index (IPNI) (from synonym Eleocharis nervosa Kük.)
To Plants of the World Online (from synonym Eleocharis nervosa Kük.)
To Plants of the World Online
To Plants of the World Online (from synonym Eleocharis ambigens Fernald)
To Royal Botanic Gardens, Kew (Eleocharis fallax K000881806 type 1)
To US Herbarium (Eleocharis fallax US1223442 type 1)
To Biodiversity Heritage Library (2 publications) (from synonym Eleocharis nervosa Kük.)
To Biodiversity Heritage Library (21 publications)
To European Nucleotide Archive, ENA (Eleocharis fallax)
To GenBank (3 nucleotides; 2 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Eleocharis ambigens Fernald)
To International Plant Names Index (IPNI) (from synonym Eleocharis nervosa Kük.)
To Plants of the World Online (from synonym Eleocharis nervosa Kük.)
To Plants of the World Online
To Plants of the World Online (from synonym Eleocharis ambigens Fernald)
To Royal Botanic Gardens, Kew (Eleocharis fallax K000881806 type 1)
To US Herbarium (Eleocharis fallax US1223442 type 1)
From editor or global species database
Hosted externally
Hosted externally
