Rhizomes creeping. Culms tufted, 5-40 cm tall, slender, nearly 4-angled, smooth, clothed at base with 2 or 3 leaf sheaths. Leaf sheaths to 2 cm, with a setaceous blade at apex. Involucral bract glumelike, as long as or shorter than spikelet, apex with a short scabrous awn. Inflorescences reduced to a single terminal spikelet, obovoid to oblong, 4-5 × ca. 2 mm, 5-or 6-flowered. Glumes straw-colored to reddish brown, laxly arranged, oblong, ovate, or oblong-ovate, 4-4.5 mm, apex with 3 costae excurrent into a short scabrous awn. Perianth bristles 7-9, white, ca. 3 × as long as nutlet, curved, smooth, apically antrorsely scabrous. Stamens 2 or 3; anthers linear; connective apex evident beyond anthers. Style slender; stigmas 3, filiform. Nutlet yellowish green, obovoid, ca. 1 mm, 3-sided, shiny. Fl. and fr. May.
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