Cyperaceae taxon details
Eleocharis compressa Sull.
1681048 (urn:lsid:marinespecies.org:taxname:1681048)
accepted
Species
Eleocharis compressa f. compressa Sull. · unaccepted
- Variety Eleocharis compressa var. acutisquamata (Buckley) S.G.Sm.
- Variety Eleocharis compressa var. compressa Sull.
- Forma Eleocharis compressa f. compressa Sull. accepted as Eleocharis compressa Sull.
- Variety Eleocharis compressa var. atrata Svenson accepted as Eleocharis elliptica Kunth
- Variety Eleocharis compressa var. borealis (Svenson) Drapalik & Mohlenbr. accepted as Eleocharis elliptica Kunth
terrestrial
Not documented
Description Plants perennial, mat-forming; rhizomes evident, short to rather long, 2–3 mm thick, firm, cortex persistent, internodes...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts 42: 50 1842 to Amer. J. Sci. Arts 42: 50 (1842),...
Description Plants perennial, mat-forming; rhizomes evident, short to rather long, 2–3 mm thick, firm, cortex persistent, internodes very short to 2 mm, scales often decaying to coarse fibers, 5–12 mm, papery. Culms subterete to greatly compressed, to 5 times as wide as thick, often with 2–12 ridges, 8–45 cm × (0.2–)0.5–1.8 mm, firm to hard, spongy. Leaves: distal leaf sheaths persistent, not splitting, proximally red, distally green to stramineous, papery, apex usually red-brown, broadly obtuse to sub-truncate, callose, tooth absent. Spikelets ovoid, 4–8 × 2–4 mm, apex acute; proximal scale clasping 3/4 of culm to amplexicaulous, entire; subproximal scale empty or with flower; floral scales spreading in fruit, 20–60, 6 per mm of rachilla, medium brown to very dark brown, sometimes stramineous or colorless, midrib region often paler, ovate, 2–3(–4) × 1–1.5 mm, apex acute to acuminate, the apical colorless hyaline region mostly longer than wide and 0.6–1.2 mm, in proximal part of spikelet 2-fid to shallowly cut, rarely entire, in distal part often entire, carinate in distal part of spikelet. Flowers: perianth bristles 0–5, stramineous, length variable, to equaling achene, obscurely to clearly retrorsely spinulose; stamens 3; anthers yellow- to orange-brown, 0.7–2 mm; styles 3-fid or some 2-fid. Achenes falling with scales or some persistent, yellow-brown or dark brown, obovoid to obpyriform, nearly equilaterally to compressed-trigonous or usually some biconvex, angles evident or obscure, 0.8–1.1 × 0.6–0.8 mm, neck very short, finely rugulose and sometimes finely (or coarsely) cancellate at 10–20X with 14–20 blunt horizontal ridges in a vertical series. Tubercles brown (to whitish), pyramidal, usually depressed, often rudimentary, 0.15–0.3 × 0.2–0.35 mm. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts 42: 50 1842 to Amer. J. Sci. Arts 42: 50 (1842),...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts 42: 50 1842 to Amer. J. Sci. Arts 42: 50 (1842), 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 compressa Sull.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681048 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, mat-forming; rhizomes evident, short to rather long, 2–3 mm thick, firm, cortex persistent, internodes very short to 2 mm, scales often decaying to coarse fibers, 5–12 mm, papery. Culms subterete to greatly compressed, to 5 times as wide as thick, often with 2–12 ridges, 8–45 cm × (0.2–)0.5–1.8 mm, firm to hard, spongy. Leaves: distal leaf sheaths persistent, not splitting, proximally red, distally green to stramineous, papery, apex usually red-brown, broadly obtuse to sub-truncate, callose, tooth absent. Spikelets ovoid, 4–8 × 2–4 mm, apex acute; proximal scale clasping 3/4 of culm to amplexicaulous, entire; subproximal scale empty or with flower; floral scales spreading in fruit, 20–60, 6 per mm of rachilla, medium brown to very dark brown, sometimes stramineous or colorless, midrib region often paler, ovate, 2–3(–4) × 1–1.5 mm, apex acute to acuminate, the apical colorless hyaline region mostly longer than wide and 0.6–1.2 mm, in proximal part of spikelet 2-fid to shallowly cut, rarely entire, in distal part often entire, carinate in distal part of spikelet. Flowers: perianth bristles 0–5, stramineous, length variable, to equaling achene, obscurely to clearly retrorsely spinulose; stamens 3; anthers yellow- to orange-brown, 0.7–2 mm; styles 3-fid or some 2-fid. Achenes falling with scales or some persistent, yellow-brown or dark brown, obovoid to obpyriform, nearly equilaterally to compressed-trigonous or usually some biconvex, angles evident or obscure, 0.8–1.1 × 0.6–0.8 mm, neck very short, finely rugulose and sometimes finely (or coarsely) cancellate at 10–20X with 14–20 blunt horizontal ridges in a vertical series. Tubercles brown (to whitish), pyramidal, usually depressed, often rudimentary, 0.15–0.3 × 0.2–0.35 mm. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts 42: 50 1842 to Amer. J. Sci. Arts 42: 50 (1842), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (138 publications)
To European Nucleotide Archive, ENA (Eleocharis compressa)
To GenBank (5 nucleotides; 5 proteins)
To International Plant Names Index (IPNI) (from synonym Eleocharis elliptica var. compressa (Sull.) Drapalik & Mohlenbr.)
To International Plant Names Index (IPNI)
To IUCN Red List (Least Concern)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51014_type_1)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51016_type_1)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51017_type_1)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51017_type_2)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51018_type_1)
To Plants of the World Online (from synonym Eleocharis elliptica var. compressa (Sull.) Drapalik & Mohlenbr.)
To Plants of the World Online
To The Plant List (from synonym Eleocharis compressa f. compressa Sull.)
To US Herbarium (Eleocharis compressa US875996 type 1)
To European Nucleotide Archive, ENA (Eleocharis compressa)
To GenBank (5 nucleotides; 5 proteins)
To International Plant Names Index (IPNI) (from synonym Eleocharis elliptica var. compressa (Sull.) Drapalik & Mohlenbr.)
To International Plant Names Index (IPNI)
To IUCN Red List (Least Concern)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51014_type_1)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51016_type_1)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51017_type_1)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51017_type_2)
To New York Botanical Garden Steere Herbarium (Eleocharis_compressa_NY51018_type_1)
To Plants of the World Online (from synonym Eleocharis elliptica var. compressa (Sull.) Drapalik & Mohlenbr.)
To Plants of the World Online
To The Plant List (from synonym Eleocharis compressa f. compressa Sull.)
To US Herbarium (Eleocharis compressa US875996 type 1)
From editor or global species database
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