Cyperaceae taxon details
Eleocharis quadrangulata (Michx.) Roem. & Schult.
1680549 (urn:lsid:marinespecies.org:taxname:1680549)
accepted
Species
Eleocharis quadrangulata var. crassior Fernald · unaccepted
Eleocharis quadrangulata var. typica Fernald · unaccepted
Limnochloa quadrangulata (Michx.) Nees · unaccepted
Scirpus quadrangulatus Michx. · unaccepted
- Variety Eleocharis quadrangulata var. crassior Fernald accepted as Eleocharis quadrangulata (Michx.) Roem. & Schult.
- Variety Eleocharis quadrangulata var. quadrangulata (Michx.) Roem. & Schult. accepted as Eleocharis quadrangulata (Michx.) Roem. & Schult.
- Variety Eleocharis quadrangulata var. typica Fernald accepted as Eleocharis quadrangulata (Michx.) Roem. & Schult.
terrestrial
Not documented
Description Plants perennial; rhizomes 1.5–4 mm thick, soft to hard, longer internodes 3–8 cm, scales 5–10 mm, tubers absent....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Syst. Veg., ed. 15 bis [Roemer & Schultes] 2: 155. 1817 to Syst....
Description Plants perennial; rhizomes 1.5–4 mm thick, soft to hard, longer internodes 3–8 cm, scales 5–10 mm, tubers absent. Culms acutely quadrangular, (30–)45–105 cm × (1–)2–5.4 mm, soft to firm, internally spongy, transverse septa incomplete; plants never forming filiform, flaccid culms. Leaves: distal leaf sheaths persistent, membranous, apex narrowly acute to acuminate, sometimes prolonged into a bladelike portion to 8 cm. Spikelets not proliferous, (15–)20–76 × 3–5(–6) mm; rachilla joints bearing obscure winglike remnants of floral scales; proximal scale empty, amplexicaulous, (1–)2.2–5.4 mm; floral scales (28–)45–135, 2–3 per mm of rachilla, stramineous to pale brown, usually with pale to dark brown submarginal band, midrib region sometimes greenish, broadly obovate to ovate, (4–)4.5–6.2 × 2.8–5 mm, subcartilaginous, apex rounded to obtuse. Flowers: perianth bristles 6–7, whitish to brown, slender, often markedly unequal, shorter than achene or some equalling tubercle, sparsely retrorsely spinulose to smooth; anthers stramineous to red-brown, 2.3–2.9 mm; styles 3-fid, sometimes 2-fid. Achenes yellow or pale green to brown or purplish, biconvex, obovoid to obpyriform, 1.8–3 × 1.3–2 mm, almost smooth to markedly sculptured at 10–15X, each face with 19–38 rows of almost linear, transversely elongated cells, which are sometimes isodiametric at achene base, apex often constricted to neck 0.3–0.4 mm wide. Tubercles dark brown or whitish, deltoid to high-pyramidal or lanceoloid, 0.7–1.5 × 0.4–1 mm, often spongy. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Syst. Veg., ed. 15 bis [Roemer & Schultes] 2: 155. 1817 to Syst....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Syst. Veg., ed. 15 bis [Roemer & Schultes] 2: 155. 1817 to Syst. Veg., ed. 15 bis 2: 155 (1817), 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. Eleocharis quadrangulata (Michx.) Roem. & Schult.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1680549 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]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Plants perennial; rhizomes 1.5–4 mm thick, soft to hard, longer internodes 3–8 cm, scales 5–10 mm, tubers absent. Culms acutely quadrangular, (30–)45–105 cm × (1–)2–5.4 mm, soft to firm, internally spongy, transverse septa incomplete; plants never forming filiform, flaccid culms. Leaves: distal leaf sheaths persistent, membranous, apex narrowly acute to acuminate, sometimes prolonged into a bladelike portion to 8 cm. Spikelets not proliferous, (15–)20–76 × 3–5(–6) mm; rachilla joints bearing obscure winglike remnants of floral scales; proximal scale empty, amplexicaulous, (1–)2.2–5.4 mm; floral scales (28–)45–135, 2–3 per mm of rachilla, stramineous to pale brown, usually with pale to dark brown submarginal band, midrib region sometimes greenish, broadly obovate to ovate, (4–)4.5–6.2 × 2.8–5 mm, subcartilaginous, apex rounded to obtuse. Flowers: perianth bristles 6–7, whitish to brown, slender, often markedly unequal, shorter than achene or some equalling tubercle, sparsely retrorsely spinulose to smooth; anthers stramineous to red-brown, 2.3–2.9 mm; styles 3-fid, sometimes 2-fid. Achenes yellow or pale green to brown or purplish, biconvex, obovoid to obpyriform, 1.8–3 × 1.3–2 mm, almost smooth to markedly sculptured at 10–15X, each face with 19–38 rows of almost linear, transversely elongated cells, which are sometimes isodiametric at achene base, apex often constricted to neck 0.3–0.4 mm wide. Tubercles dark brown or whitish, deltoid to high-pyramidal or lanceoloid, 0.7–1.5 × 0.4–1 mm, often spongy. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Syst. Veg., ed. 15 bis [Roemer & Schultes] 2: 155. 1817 to Syst. Veg., ed. 15 bis 2: 155 (1817), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (181 publications)
To Biodiversity Heritage Library (55 publications) (from synonym Scirpus quadrangulatus Michx.)
To European Nucleotide Archive, ENA (Eleocharis quadrangulata)
To GenBank (12 nucleotides; 10 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Limnochloa quadrangulata (Michx.) Nees)
To International Plant Names Index (IPNI) (from synonym Eleocharis quadrangulata var. crassior Fernald)
To International Plant Names Index (IPNI) (from synonym Scirpus quadrangulatus Michx.)
To International Plant Names Index (IPNI) (from synonym Eleocharis quadrangulata var. typica Fernald)
To Plants of the World Online (from synonym Eleocharis quadrangulata var. typica Fernald)
To Plants of the World Online (from synonym Eleocharis quadrangulata var. crassior Fernald)
To Plants of the World Online (from synonym Scirpus quadrangulatus Michx.)
To Plants of the World Online (from synonym Limnochloa quadrangulata (Michx.) Nees)
To Plants of the World Online
To The Plant List (from synonym Eleocharis quadrangulata var. quadrangulata (Michx.) Roem. & Schult.)
To US Herbarium (Eleocharis quadrangulata crassior US1100348 type 1) (from synonym Eleocharis quadrangulata var. crassior Fernald)
To Biodiversity Heritage Library (55 publications) (from synonym Scirpus quadrangulatus Michx.)
To European Nucleotide Archive, ENA (Eleocharis quadrangulata)
To GenBank (12 nucleotides; 10 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Limnochloa quadrangulata (Michx.) Nees)
To International Plant Names Index (IPNI) (from synonym Eleocharis quadrangulata var. crassior Fernald)
To International Plant Names Index (IPNI) (from synonym Scirpus quadrangulatus Michx.)
To International Plant Names Index (IPNI) (from synonym Eleocharis quadrangulata var. typica Fernald)
To Plants of the World Online (from synonym Eleocharis quadrangulata var. typica Fernald)
To Plants of the World Online (from synonym Eleocharis quadrangulata var. crassior Fernald)
To Plants of the World Online (from synonym Scirpus quadrangulatus Michx.)
To Plants of the World Online (from synonym Limnochloa quadrangulata (Michx.) Nees)
To Plants of the World Online
To The Plant List (from synonym Eleocharis quadrangulata var. quadrangulata (Michx.) Roem. & Schult.)
To US Herbarium (Eleocharis quadrangulata crassior US1100348 type 1) (from synonym Eleocharis quadrangulata var. crassior Fernald)
From editor or global species database
Hosted externally, from synonym
