Cyperaceae taxon details
Asterochaete angustissima (Cherm.) X.F.Zhang
1776071 (urn:lsid:marinespecies.org:taxname:1776071)
accepted
Species
terrestrial
(of Carpha angustissima Cherm.) Chermezon, H. (1935). Cypéracées récoltées par M. Humbert au Congo belge oriental. <em>Bulletin de la Société Botanique de France.</em> 82(5-6): 334-346.
page(s): 341 [details] Available for editors
[request]
page(s): 341 [details] Available for editors
[request]
Description Tufted perennial, 25–50 cm high; rhizome short to long. Culms unnoded, rarely 1-noded with a single cauline leaf. Leaves...
Description Tufted perennial, 25–50 cm high; rhizome short to long. Culms unnoded, rarely 1-noded with a single cauline leaf. Leaves crowded at the base of the culms; blades straight, 15–35 cm long, 0.8–1.5(–2.0) mm wide, more or less flat to V-shaped or U-shaped in cross-section, V-shaped near apex, with a slightly thickened midrib or keeled abaxially (very slender leaves may have a poorly developed midrib), usually smooth but sometimes sparsely scabrous; sheaths dull mid- to dark orange to red-brown below, pale yellow-green towards apex. Inflorescence 6–35 cm long, with 2–4 internodes; spikelets 12–35 loosely arranged in small clusters (not dense). Involucral bracts several; lowest equalling to slightly exceeding the inflorescence, 15–30 cm long, to 1.5 mm wide. Spikelets 5.1–6.5 mm long, with 2 (very rarely 1) bisexual flowers; glumes 5, pale yellow-brown to mid-brown; lowest 3 glumes empty, persistent; the upper two fertile, deciduous, very rarely only the upper one fertile and the uppermost one sterile; the lowest 2 glumes shorter than the rest; the proximal fertile glume 4.6–5.5 mm long, 1.1–2 mm wide; the second fertile glume 3.5–5 mm long, 0.5–1.4 mm wide; the axis elongated above proximal fertile glume and adnate to the base of that glume. Bristles: outer 3 bristles shorter than inner 3 and much shorter than the body of the nutlet, lower part of bristles slightly compressed and antrorsely scabrous with sparse slightly longer hairs near the base (to twice as long right at the base), and upper half antrorsely scabrous, or outer bristles evenly and shortly antrorsely scabrous over their whole length; the inner 3 (2.0–)3–4.4 mm long, as long as to exceeding the body of the nutlet by up to about one-half of the length; lower part of bristles in inner whorl more or less flattened and antrorsely scabrous with sparse slightly longer hairs near the base (up to twice as long right at the base). Anthers greyish, 1.5–4 mm long (excluding appendage), with apical appendage 0.02–0.15 mm long, 0.05–0.15 mm wide. Style base 0.7–1.1 mm long, 0.15–0.3 mm in diameter, glabrous at base, very sparsely hispidulous, not extending onto the apex of the nutlet. Nutlets 2 per spikelet, very rarely 1, ellipsoid to narrow-ellipsoid, 2.6–2.9 mm long, 0.8–1.1 mm in diameter, pale yellow-brown to mid-orange-brown at maturity, ribs not paler, surface reticulate and puncticulate. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Asterochaete angustissima (Cherm.) X.F.Zhang. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1776071 on 2026-01-12
Date
action
by
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
original description
(of Carpha angustissima Cherm.) Chermezon, H. (1935). Cypéracées récoltées par M. Humbert au Congo belge oriental. <em>Bulletin de la Société Botanique de France.</em> 82(5-6): 334-346.
page(s): 341 [details] Available for editors [request]
new combination reference Bruhl, J. J.; Wilson, K. L.; Zhang, X. (2024). A taxonomic review of the austral genera Asterochaete and Carpha (Cyperaceae, Carpheae). <em>Australian Systematic Botany.</em> 37(3)., available online at https://doi.org/10.1071/sb23015
page(s): 15 [details]
page(s): 341 [details] Available for editors
[request]new combination reference Bruhl, J. J.; Wilson, K. L.; Zhang, X. (2024). A taxonomic review of the austral genera Asterochaete and Carpha (Cyperaceae, Carpheae). <em>Australian Systematic Botany.</em> 37(3)., available online at https://doi.org/10.1071/sb23015
page(s): 15 [details]
From editor or global species database
Description Tufted perennial, 25–50 cm high; rhizome short to long. Culms unnoded, rarely 1-noded with a single cauline leaf. Leaves crowded at the base of the culms; blades straight, 15–35 cm long, 0.8–1.5(–2.0) mm wide, more or less flat to V-shaped or U-shaped in cross-section, V-shaped near apex, with a slightly thickened midrib or keeled abaxially (very slender leaves may have a poorly developed midrib), usually smooth but sometimes sparsely scabrous; sheaths dull mid- to dark orange to red-brown below, pale yellow-green towards apex. Inflorescence 6–35 cm long, with 2–4 internodes; spikelets 12–35 loosely arranged in small clusters (not dense). Involucral bracts several; lowest equalling to slightly exceeding the inflorescence, 15–30 cm long, to 1.5 mm wide. Spikelets 5.1–6.5 mm long, with 2 (very rarely 1) bisexual flowers; glumes 5, pale yellow-brown to mid-brown; lowest 3 glumes empty, persistent; the upper two fertile, deciduous, very rarely only the upper one fertile and the uppermost one sterile; the lowest 2 glumes shorter than the rest; the proximal fertile glume 4.6–5.5 mm long, 1.1–2 mm wide; the second fertile glume 3.5–5 mm long, 0.5–1.4 mm wide; the axis elongated above proximal fertile glume and adnate to the base of that glume. Bristles: outer 3 bristles shorter than inner 3 and much shorter than the body of the nutlet, lower part of bristles slightly compressed and antrorsely scabrous with sparse slightly longer hairs near the base (to twice as long right at the base), and upper half antrorsely scabrous, or outer bristles evenly and shortly antrorsely scabrous over their whole length; the inner 3 (2.0–)3–4.4 mm long, as long as to exceeding the body of the nutlet by up to about one-half of the length; lower part of bristles in inner whorl more or less flattened and antrorsely scabrous with sparse slightly longer hairs near the base (up to twice as long right at the base). Anthers greyish, 1.5–4 mm long (excluding appendage), with apical appendage 0.02–0.15 mm long, 0.05–0.15 mm wide. Style base 0.7–1.1 mm long, 0.15–0.3 mm in diameter, glabrous at base, very sparsely hispidulous, not extending onto the apex of the nutlet. Nutlets 2 per spikelet, very rarely 1, ellipsoid to narrow-ellipsoid, 2.6–2.9 mm long, 0.8–1.1 mm in diameter, pale yellow-brown to mid-orange-brown at maturity, ribs not paler, surface reticulate and puncticulate. [details]
