Isolepis cernua (Vahl) Roem. & Schult. / Homotypic Synonyms: Scirpus cernuus Vahl, it is a tufted annual or short-lived perennial herb, rhizome 1-19×0,3-1,5 mm, ascending, whitish, culms 1-30 cm tall, 0,2-1 mm, without node. Leaf sheaths 4-30 mm long, 0,3-1,8 mm, brown or green, blades 0,1-22,2 cm long, 0,1-0,7 mm wide. Inflorescence involucral bract 1, usually erect, sometimes subtending flower or resembling enlarged floral scale, 2–6(23) mm. Spikes 2–5 × 1–2 mm; proximal floral scales to 2 mm long, other floral scales 1.2–1.8 × 1–1.3 mm. Flowers, anthers 0.3–0.6 mm. Achenes ellipsoid to obovoid, compressed-trigonous to thickly biconvex, lateral angles usually prominent, dorsal angle prominent to obscure, 0.8–1 × 0.5–0.7 mm long, medium to dark brown or stramineous, distinctly papillose at 10–15× to obscurely papillose at 40×, often with thin whitish surface layer
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