Rhizomes short. Culms densely tufted, 20-90 cm tall, 0.7-1 mm thick, subterete, smooth except below inflorescences becoming 3-angled and scabrous on angles, clothed at base with 5 or 6 bladeless leaf sheaths. Leaf sheath brown to cinnamon, 5-18 cm, tightly surrounding base of culm, membranous, mouth obliquely truncate and with a hyaline margin; leaf blade of apical sheaths pale green, setaceous, 0.5-1.5 cm, margin scabrous. Involucral bracts glumelike, ovate to oblong, 3-7 mm, apex obtuse and with a ± long scabrous mucro. Inflorescence a terminal, umbelliform corymb, bearing 2-4(-6) spikelets. Spikelets ovoid to narrowly ovoid-oblong, 5-10 × ca. 2 mm, 5-10-flowered; lateral spikelets with a short peduncle; terminal spikelet sessile. Glumes straw-colored to brown, laxly arranged, oblong to lanceolate-oblong, 3.5-4.5 mm, membranous, margin hyaline, apex acute to obtuse and with a costa sometimes excurrent into a mucro. Perianth bristles 6, as long as nutlet, apically antrorsely scabrous. Stamens 3; filaments long; anthers linear, ca. 2 mm. Style ca. 3 mm; stigmas 3, filiform. Nutlet yellowish brown, oblong to ellipsoid, 2-3 mm, 3-sided, apex apiculate. Fl. and fr. Mar-Jun.
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