Cyperaceae taxon details
Eleocharis retroflexa (Poir.) Urb.
1680557 (urn:lsid:marinespecies.org:taxname:1680557)
accepted
Species
Baeothryon retroflexum (Poir.) A.Dietr. · unaccepted
Chaetocyperus polymorphus var. depauperatus Liebm. · unaccepted
Scirpus retroflexus Poir. · unaccepted
- Subspecies Eleocharis retroflexa subsp. chaetaria (Roem. & Schult.) T.Koyama
- Subspecies Eleocharis retroflexa subsp. depressa Zavaro & Pabón
- Subspecies Eleocharis retroflexa subsp. retroflexa (Poir.) Urb.
- Subspecies Eleocharis retroflexa subsp. subtilissima (Nelmes) Lye
- Subspecies Eleocharis retroflexa subsp. depressa Zavaro & Pabon (uncertain > unassessed)
terrestrial
Not documented
Description Plants annual, tufted, mat-forming, often stoloniferous, sometimes entirely vegetative; rhizomes absent. Culms erect,...
Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from (Poir.) Urb. to Urb., information provided by Alan E. on...
Description Plants annual, tufted, mat-forming, often stoloniferous, sometimes entirely vegetative; rhizomes absent. Culms erect, ascending or arching, pentagonal, sulcate, 1.5–10 cm × 0.2–0.3 mm [larger], soft. Leaves: distal leaf sheaths persistent or disintegrating, pale brown to green, red-spotted [mostly red-brown], membranous; apex acuminate. Spikelets: basal spikelets usually present, bisexual; often proliferous, ellipsoid or obovoid, laterally compressed, 1.7–3.9 × 1.2–2 mm, apex acute; proximal scale empty or with a flower, deciduous, amplexicaulous, similar to floral scales (sometimes 2.4–2.9 mm); subproximal scale with a flower; floral scales clearly distichous, 2–6 [or more], 4–6 per mm of rachilla, pale brown [marked red-brown], ovate or elliptic, 1.8–2.5 × 0.8–1.4 mm, membranous, apex rounded to obtuse, midribs green, keeled. Flowers: perianth bristles 6, colorless or pale brown, shorter than achenes; spinules not evident at 45X; stamens 3; anthers (0.55–)0.7 mm; styles 3-fid. Achenes stramineous (to cream), obovoid, trigonous or subterete, not compressed, angles prominent, 0.8 × 0.5–0.55 mm, apex not constricted proximal to tubercle, coarsely cancellate or honeycomb-reticulate at 10–15X. Tubercles red-brown, pyramidal, trigonous, proximally clearly to obscurely 3-lobed, lobes decurrent on achene angles, 0.3–0.35 × 0.3–0.4 mm. [details]
Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from (Poir.) Urb. to Urb., information provided by Alan E. on...
Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from (Poir.) Urb. to Urb., 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 retroflexa (Poir.) Urb.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680557 on 2025-09-12
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 Plants annual, tufted, mat-forming, often stoloniferous, sometimes entirely vegetative; rhizomes absent. Culms erect, ascending or arching, pentagonal, sulcate, 1.5–10 cm × 0.2–0.3 mm [larger], soft. Leaves: distal leaf sheaths persistent or disintegrating, pale brown to green, red-spotted [mostly red-brown], membranous; apex acuminate. Spikelets: basal spikelets usually present, bisexual; often proliferous, ellipsoid or obovoid, laterally compressed, 1.7–3.9 × 1.2–2 mm, apex acute; proximal scale empty or with a flower, deciduous, amplexicaulous, similar to floral scales (sometimes 2.4–2.9 mm); subproximal scale with a flower; floral scales clearly distichous, 2–6 [or more], 4–6 per mm of rachilla, pale brown [marked red-brown], ovate or elliptic, 1.8–2.5 × 0.8–1.4 mm, membranous, apex rounded to obtuse, midribs green, keeled. Flowers: perianth bristles 6, colorless or pale brown, shorter than achenes; spinules not evident at 45X; stamens 3; anthers (0.55–)0.7 mm; styles 3-fid. Achenes stramineous (to cream), obovoid, trigonous or subterete, not compressed, angles prominent, 0.8 × 0.5–0.55 mm, apex not constricted proximal to tubercle, coarsely cancellate or honeycomb-reticulate at 10–15X. Tubercles red-brown, pyramidal, trigonous, proximally clearly to obscurely 3-lobed, lobes decurrent on achene angles, 0.3–0.35 × 0.3–0.4 mm. [details]Taxonomic remark Source in seed data: wcs Updated scientificnameAuthorship from (Poir.) Urb. to Urb., information provided by Alan E. on email Oct. 12 2020 More details could be found in The Plant List v.1.1.< [details]
To Biodiversity Heritage Library (3 publications) (from synonym Baeothryon retroflexum (Poir.) A.Dietr.)
To Biodiversity Heritage Library (37 publications)
To Biodiversity Heritage Library (50 publications) (from synonym Scirpus retroflexus Poir.)
To European Nucleotide Archive, ENA (Eleocharis retroflexa)
To GenBank (4 nucleotides; 0 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Baeothryon retroflexum (Poir.) A.Dietr.)
To International Plant Names Index (IPNI) (from synonym Scirpus retroflexus Poir.)
To IUCN Red List (Least Concern)
To Plants of the World Online (from synonym Baeothryon retroflexum (Poir.) A.Dietr.)
To Plants of the World Online
To Plants of the World Online (from synonym Scirpus retroflexus Poir.)
To Royal Botanic Gardens, Kew (Eleocharis retroflexa K000632046 type 1)
To The Plant List (from synonym Chaetocyperus polymorphus var. depauperatus Liebm.)
To Biodiversity Heritage Library (37 publications)
To Biodiversity Heritage Library (50 publications) (from synonym Scirpus retroflexus Poir.)
To European Nucleotide Archive, ENA (Eleocharis retroflexa)
To GenBank (4 nucleotides; 0 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Baeothryon retroflexum (Poir.) A.Dietr.)
To International Plant Names Index (IPNI) (from synonym Scirpus retroflexus Poir.)
To IUCN Red List (Least Concern)
To Plants of the World Online (from synonym Baeothryon retroflexum (Poir.) A.Dietr.)
To Plants of the World Online
To Plants of the World Online (from synonym Scirpus retroflexus Poir.)
To Royal Botanic Gardens, Kew (Eleocharis retroflexa K000632046 type 1)
To The Plant List (from synonym Chaetocyperus polymorphus var. depauperatus Liebm.)
From editor or global species database
Hosted externally
