Rhizome short, cespitose. Stems central, more or less hidden amongst the leaves, erect, triquetrous, scaberulous above, 5-10(-30) cm by 0.25-0.5 mm, surrounded below the leaves by brown, fibrous remains of old leaf-sheaths. Leaves basal, much longer than the stems, plicate to flat, long-attenuate, scabrid on the margins and upper surface, 1-3 mm wide; sheaths pubescent. Spikelets 3-6, upper approximate, lower distant, erect or suberect, cylindric, lax-flowered; terminal spikelet male, 1(-2) cm long, 1 mm thick, lateral ones female or with some male flowers at the top, 0.5-2 cm long, 3-4 mm thick; peduncles smooth or scaberulous, lower exserted. Lower bracts foliaceous, much exceeding the inflorescence, upper much reduced. Glumes elliptic-ovate to oblong-lanceolate, acute or with rounded apex, slenderly nerved, with not or scarcely excurrent midnerve and hyaline margins, erose-ciliate towards the apex, 2-3 mm long. Utricles lageniform, trigonous, broadest c. 2 mm from the base, subcoriaceous, straight, suberect, strongly multinerved, more or less puberulous above, stramineous or greenish, shortly stipitate, 5.5-6.5 by 1.25-1.5 mm; beak 0.75-1 mm long, bidenticulate. Nut rhomboid, triquetrous, with faces concave below, stoutly stipitate, the apex subabruptly contracted into a cylindric, truncate neck c. 1 mm long and ¾ mm broad, the whole nut c. 4 mm long. Style-base scarcely thickened, centred in the apical hollow of the nut. Stigmas 3.
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Plants densely tufted in small clumps. Rhizome short, clothed with hard, dark brown fibers. Culms very low, hidden by leaves, 5-10 cm tall. Leaves narrowly linear, very elongate, 15-28 cm, 2-3 mm wide, gradually tapering to long acute apex. Lower 2 or 3 involucral bracts leaflike, much surpassing inflorescence, up to 20 cm, shortly sheathing. Spikes 3-6, subfastigiate except lowest, erect; terminal spike male, linear, 1-2 cm, shorter than next female spike; lateral spikes female, shortly cylindric, 1-2 cm, sublaxly and contiguously few flowered, peduncle enclosed in sheath. Female glumes stramineous, oblong-elliptic, hard membranous, slenderly many veined besides obsoletely 3-veined costa, ciliolate, apex truncate-rounded, occasionally mucronate. Utricles upright, lageniform with weak constriction at middle, 2 × as long as glume, 5-6.5 mm, thickly membranous, wholly pubescent, slenderly many veined, base stipitate, apex gradually narrowed to erect short beak, orifice shallowly 2-toothed. Nutlets tightly enclosed, ovate-rhomboid, ca. 4 mm, trigonous, base cuneate, apex with neck ca. 1 × 0.7 mm, and truncate at top; style short, base thickened; stigmas 3, short.