Isolepis cernua (Vahl) Roemer & Schultes in J. J. Roemer et al. (Q3271)
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Isolepis cernua is a taxon with the rank species within the genus Isolepis
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English |
Isolepis cernua (Vahl) Roemer & Schultes in J. J. Roemer et al.
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Isolepis cernua is a taxon with the rank species within the genus Isolepis
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Statements
taxon/id/Isolepis cernua (Vahl) Roemer & Schultes
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Isolepis cernua (Vahl) Roemer & Schultes
Isolepis cernua
(Vahl) Roemer & Schultes
FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
accepted
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CA-BC
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Klinkenberg, B. (ed.). 2010+. E-Flora BC: Electronic Atlas of the Plants of British Columbia. Lab. for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver, B.C. http://www.eflora.bc.ca http://www.eflora.bc.ca/
CA-BC
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US-CA
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US-OR
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US-TX
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US-WA
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Plants annual (or perennial?);
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rhizomes usually obscured by culm bases and very short, sometimes vertical and elongated.
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Culms 4–40 cm × 0.2–0.5 mm.
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Leaves sometimes sparsely orange-punctate at 10–15X;
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sheaths usually reddish proximally;
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distal blade rudimentary to much longer than sheath, often exceeding culm, to 20 cm × 0.2–1 mm.
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Inflorescences: involucral-bract 1, sometimes subtending flower or resembling enlarged floral scale, 2–6 (–23) mm.
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Spikelets 2–5 × 1–2 mm;
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scales partly or completely dark orange to redbrown, rarely stramineous, midrib greenish to stramineous, not gibbous, obscurely to prominently 3–11-veined, midrib keeled near apex, membranous, hyaline, apex rounded to acute, with mucro less than 0.1 mm;
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other scales 1.2–1.8 × 1–1.3 mm.
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Flowers: anthers 0.3–0.6 mm;
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styles 3-fid or 3-fid and 2-fid.
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Achenes falling separately from scales, medium to dark-brown or stramineous, ellipsoid to obovoid, compressedtrigonous to thickly biconvex, lateral angles usually prominent, abaxial angle prominent to obscure, faces convex or adaxial face slightly concave, 0.8–1 × 0.5–0.7 mm, distinctly papillose at 10–15X to obscurely papillose at 40X, often with thin whitish surface layer.
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orange-punctate
sometimes sparsely
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