Cyperaceae taxon details
Cyperus clarus S.T.Blake
1679353 (urn:lsid:marinespecies.org:taxname:1679353)
accepted
Species
recent only
Not documented
Description Slender annual or perennial, tufted, 20–90 cm high, not viscid. Culms triquetrous to trigonous, smooth or scabrous at...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Proc. Roy. Soc. Queensland 51: 44 1939 publ. 1940 to Proc. Roy. Soc....
Description Slender annual or perennial, tufted, 20–90 cm high, not viscid. Culms triquetrous to trigonous, smooth or scabrous at apex, 1–2.5 mm diam. Leaves flat or carinate, relatively thin-textured, somewhat septate-nodulose, ½–⅔ as long as culms, to 6 mm wide, bright yellow-green; midrib obvious abaxially, smooth or scabrous towards apex; marginal prickles sparse to dense, irregularly spaced (0.3–1.4 mm apart), short to long, 0.05–0.20 mm long, erect to antrorse and retrorse, occasionally flabellate, aculeate or rarely papillate; leaf sheaths ± septate-nodulose, not smooth or shining, chestnut-brown. Inflorescence simple, 3–6 primary branches to 9.5 cm long; bracts erect when young, spreading nearly horizontally when mature, (1–)2–3 exceeding the inflorescence. Spikelets numerous in ± dense subdigitate, ± globose clusters of 1.5–3.5 cm diam.; spikelets compressed, oblong to narrow-ovate, 7–18 mm long, 3.0–4.5 mm wide in side view, 8–14(–20)-flowered; rachilla not thickened, not to broadly winged, wings to 0.1 mm wide; glume spacing 1.2–1.5 mm; spikelet with rachilla persistent, glumes falling individually. Glumes elliptic or ovate, acute with excurved to ± straight mucro 0.3–0.8 mm long, golden-brown to brown when old and dry, with green midrib, 2.5–4.0 mm long, 0.6–1.0 mm wide, sides 3–4-nerved, margins slightly inrolled and membranous. Anthers 0.3–1.1 mm long excluding appendage <0.1 mm long. Nut trigonous, obovate with ± obtuse to broad-acute apex, faces concave to flat, grey to nearly black (epidermal cells whitish over black body of nut), tuberculate, dull to glistening, 1.6–1.9 mm long, ½–⅔ as long as glume, 0.6–0.8 mm wide, falling with glume or separately. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Proc. Roy. Soc. Queensland 51: 44 1939 publ. 1940 to Proc. Roy. Soc....
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Proc. Roy. Soc. Queensland 51: 44 1939 publ. 1940 to Proc. Roy. Soc. Queensland 51: 44 (1939 publ. 1940), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
Cyperaceae Working Group. (2026). [see How to cite]. Global Cyperaceae Database. Cyperus clarus S.T.Blake. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1679353 on 2026-10-05
Date
action
by
2024-12-10 11:47:54Z
unchecked
db_admin
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 Slender annual or perennial, tufted, 20–90 cm high, not viscid. Culms triquetrous to trigonous, smooth or scabrous at apex, 1–2.5 mm diam. Leaves flat or carinate, relatively thin-textured, somewhat septate-nodulose, ½–⅔ as long as culms, to 6 mm wide, bright yellow-green; midrib obvious abaxially, smooth or scabrous towards apex; marginal prickles sparse to dense, irregularly spaced (0.3–1.4 mm apart), short to long, 0.05–0.20 mm long, erect to antrorse and retrorse, occasionally flabellate, aculeate or rarely papillate; leaf sheaths ± septate-nodulose, not smooth or shining, chestnut-brown. Inflorescence simple, 3–6 primary branches to 9.5 cm long; bracts erect when young, spreading nearly horizontally when mature, (1–)2–3 exceeding the inflorescence. Spikelets numerous in ± dense subdigitate, ± globose clusters of 1.5–3.5 cm diam.; spikelets compressed, oblong to narrow-ovate, 7–18 mm long, 3.0–4.5 mm wide in side view, 8–14(–20)-flowered; rachilla not thickened, not to broadly winged, wings to 0.1 mm wide; glume spacing 1.2–1.5 mm; spikelet with rachilla persistent, glumes falling individually. Glumes elliptic or ovate, acute with excurved to ± straight mucro 0.3–0.8 mm long, golden-brown to brown when old and dry, with green midrib, 2.5–4.0 mm long, 0.6–1.0 mm wide, sides 3–4-nerved, margins slightly inrolled and membranous. Anthers 0.3–1.1 mm long excluding appendage <0.1 mm long. Nut trigonous, obovate with ± obtuse to broad-acute apex, faces concave to flat, grey to nearly black (epidermal cells whitish over black body of nut), tuberculate, dull to glistening, 1.6–1.9 mm long, ½–⅔ as long as glume, 0.6–0.8 mm wide, falling with glume or separately. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Proc. Roy. Soc. Queensland 51: 44 1939 publ. 1940 to Proc. Roy. Soc. Queensland 51: 44 (1939 publ. 1940), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (4 publications)
To International Plant Names Index (IPNI)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Cyperus clarus K000950432 type 1)
To US Herbarium (Cyperus clarus US3151519 type 1)
To International Plant Names Index (IPNI)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Cyperus clarus K000950432 type 1)
To US Herbarium (Cyperus clarus US3151519 type 1)
From editor or global species database
Hosted externally
Hosted externally
