Perennial with very short rhizome. Stems triquetrous, smooth, 30-80 cm by 3-4 mm. Leaves flat, herbaceous, rather abruptly acuminate, with scabrous margins and scabrid nerves, grassgreen on both sides, 5-8 mm wide; sheaths membranous in front, purplish puncticulate. Inflorescence compound to supradecompound, diffuse, lax, up to 40 cm across. Involucral bracts 5-6, patent, the lowest up to 50 by 1 cm. Primary rays 8-many, very unequal, spreading, smooth, up to c. 15 cm, secondary ones up to 5(-7) cm. Spikelets very numerous, partly solitary and long-peduncled, partly 2-3 digitately fascicled, oblong-linear, compressed, 12-18(-30)-flowered, 6-8(-10) by 1½-2 mm; rachilla straight, hardly winged, persistent; internodes ⅓-2/5 mm. Glumes membranous, somewhat excurved at the top, ovate or broadly ovate, obtuse, muticous or minutely mucronulate, with green, 3-nerved keel and nerveless, slightly sulcate, stramineous or ferrugineous, purplish puncticulate-striate sides, 1¼-1½ by 1-1½ mm, ⅓-½ imbricate. Stamen 1; anther oblong-linear, c. 3/5 mm; connective produced, bristly at the top. Style short; stigmas 3. Nut trigonous, ovoid or ellipsoid, granulate, c. ¾ by ½ mm.
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