Perennial with short rhizome. Stems densely tufted, rigid, angular-sulcate, somewhat incrassate just below the inflorescence, antrorsely scabrous, 30-80 cm by c. 1 mm. Leaves basal, shorter than the stems, up to 30 cm long, erect, flat, rigid, with obtuse or rounded apex, glabrous, with scabrous margins, greyish green or glaucous, 2-3 mm wide; ligule absent; sheaths white-scarious in front. Inflorescence consisting of a single terminal spikelet. Spikelet erect, ellipsoid or slightly obovoid, terete, acute, densely many-flowered, 8-20 by 5-6 mm; rachilla narrowly winged. Glumes spiral, membranous, oblong-ovate, very obtuse, minutely apiculate, not keeled, with strong midnerve, nerveless sides, and densely ciliate upper margin, reddish brown in the apical half, much paler in the basal half, 5-7 by 3½-4 mm; lower empty glumes much smaller, manifestly mucronate. Stamens 3; anthers linear, 3-4 mm long. Style triquetrous, pyramidally thickened at the base, glabrous, 4-5 mm long; stigmas 3, somewhat shorter than the style. Nut trigonous with convex faces, tricostate, pyriform, shortly stipitate, verrucose in the upper part, pale brown, l.6-2 by 1½-1¾ mm; epidermal cells isodiametric hexagonal to roundish.
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