Cyperaceae taxon details
Eleocharis decumbens C.B.Clarke
1681063 (urn:lsid:marinespecies.org:taxname:1681063)
accepted
Species
terrestrial
Not documented
Description Plants perennial, densely tufted; rhizomes often hidden by culms and roots, fairly long, 3–4 mm thick, hard, cortex...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Bull. Misc. Inform. Kew, Addit. Ser. 8: 23 1908 to Bull. Misc....
Description Plants perennial, densely tufted; rhizomes often hidden by culms and roots, fairly long, 3–4 mm thick, hard, cortex persistent, longer internodes from very short to 5 mm, scales usually clearly evident, disintegrating to fibers, 20–25 mm, papery. Culms terete, often with 10–18 blunt ridges when dry, 10–50 cm × 0.3–2 mm, firm to rigid, spongy. Leaves: distal leaf sheaths persistent, not splitting, proximally brown or reddish, distally stramineous, brown, reddish or green, often inflated, papery, apex mostly dark red-brown, subtruncate to obtuse, often callose, tooth absent. Spikelets ovoid, 3–8 × 2–2.5 mm, apex acute; proximal scale amplexicaulous, entire; subproximal scale empty or with flower; floral scales appressed in fruit, 10–20, 3 per mm of rachilla, orange-brown, midrib regions often greenish, ovate, 3–3.5 × 1.5 mm, apex entire, acute, often carinate in distal part of spikelet. Flowers: perianth bristles 6, stramineous, stout, nearly equal, mostly equaling or exceeding tubercle, (0.5–)1–2.2 mm, prominently retrorsely spinulose; stamens 3(?); anthers dark yellow to stramineous, 1.2–1.5; styles 3-fid. Achenes falling with scales, dark brown, obpyriform, nearly eqilaterally- to greatly compressed-trigonous, angles slightly prominent, 1–1.3 × 0.75–0.9 mm, neck absent or short, finely rugulose at 20X with more than 20 horizontal ridges in vertical series, or reticulate or cancellate at 20–30X. Tubercles well developed, whitish, pyramidal, as high as wide to much lower than wide, 0.2–0.6 × 0.4–0.7 mm. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Bull. Misc. Inform. Kew, Addit. Ser. 8: 23 1908 to Bull. Misc....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Bull. Misc. Inform. Kew, Addit. Ser. 8: 23 1908 to Bull. Misc. Inform. Kew, Addit. Ser. 8: 23 (1908), 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 decumbens C.B.Clarke. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681063 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, densely tufted; rhizomes often hidden by culms and roots, fairly long, 3–4 mm thick, hard, cortex persistent, longer internodes from very short to 5 mm, scales usually clearly evident, disintegrating to fibers, 20–25 mm, papery. Culms terete, often with 10–18 blunt ridges when dry, 10–50 cm × 0.3–2 mm, firm to rigid, spongy. Leaves: distal leaf sheaths persistent, not splitting, proximally brown or reddish, distally stramineous, brown, reddish or green, often inflated, papery, apex mostly dark red-brown, subtruncate to obtuse, often callose, tooth absent. Spikelets ovoid, 3–8 × 2–2.5 mm, apex acute; proximal scale amplexicaulous, entire; subproximal scale empty or with flower; floral scales appressed in fruit, 10–20, 3 per mm of rachilla, orange-brown, midrib regions often greenish, ovate, 3–3.5 × 1.5 mm, apex entire, acute, often carinate in distal part of spikelet. Flowers: perianth bristles 6, stramineous, stout, nearly equal, mostly equaling or exceeding tubercle, (0.5–)1–2.2 mm, prominently retrorsely spinulose; stamens 3(?); anthers dark yellow to stramineous, 1.2–1.5; styles 3-fid. Achenes falling with scales, dark brown, obpyriform, nearly eqilaterally- to greatly compressed-trigonous, angles slightly prominent, 1–1.3 × 0.75–0.9 mm, neck absent or short, finely rugulose at 20X with more than 20 horizontal ridges in vertical series, or reticulate or cancellate at 20–30X. Tubercles well developed, whitish, pyramidal, as high as wide to much lower than wide, 0.2–0.6 × 0.4–0.7 mm. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Bull. Misc. Inform. Kew, Addit. Ser. 8: 23 1908 to Bull. Misc. Inform. Kew, Addit. Ser. 8: 23 (1908), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (4 publications)
To European Nucleotide Archive, ENA (Eleocharis decumbens)
To GenBank (3 nucleotides; 2 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Eleocharis montevidensis var. decumbens (C.B.Clarke) V.E.Grant)
To Plants of the World Online (from synonym Eleocharis montevidensis var. decumbens (C.B.Clarke) V.E.Grant)
To Plants of the World Online
To European Nucleotide Archive, ENA (Eleocharis decumbens)
To GenBank (3 nucleotides; 2 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Eleocharis montevidensis var. decumbens (C.B.Clarke) V.E.Grant)
To Plants of the World Online (from synonym Eleocharis montevidensis var. decumbens (C.B.Clarke) V.E.Grant)
To Plants of the World Online
