Rhizomes short. Culms tufted, 10-32 cm tall, 2-3 mm thick, terete, smooth, clothed at base with 2 or 3 leaf sheaths. Leaf sheaths 1.5-9 cm, mouth obliquely truncate; apicalmost sheath usually with a slender 1-1.7 cm blade. Involucral bract 1, culmlike, 13-18 cm, sometimes longer than culm, subterete, base dilated, margin hyaline; bractlets pale brown, glumelike, ovate to broadly lanceolate, 4-10 mm. Inflorescence a pseudolateral head, with 5-10 spikelets. Spikelets sessile, oblong to narrowly ovoid, 7-20 × ca. 1 mm, many flowered. Glumes pale brown with brown lines, oblong, ca. 2 mm, membranous, deciduous at nutlet maturity, margin apically ciliate, apex rounded and with a 1-3-veined costa excurrent into a mucro. Perianth bristles 4-6, ± as long as nutlet, retrorsely scabrous. Stamens 1 or 2; anthers ellipsoid, short. Style long; stigmas 2, slender. Nutlet blackish brown, obovoid, ca. 1 mm, plano-convex, indistinctly transversely wrinkled, shiny. Fl. Sep.
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