Rhizome slender. Culms 20-60 cm tall, slender, trigonous, scabrous above, clothed at base with pale brown bladeless sheaths. Leaves shorter than culm, blades linear, 1.5-2 mm wide, flat, scabrous. Involucral bracts glumelike. Spicate inflorescence oblong or oblong-ovate, 1.8-2.7 cm; spikes 6-10, androgynous or mixed gynaecandrous, rarely female, ovate or oblong-ovate, 5-7 mm. Female glumes oblong-ovate, margins pale hyaline, apex acute. Utricles pale ferruginous-yellow, slightly greenish above, longer than glume, ovate-lanceolate, plano-convex, (5-)5.5-6.5 mm, subleathery, sparsely verruculose and hirsute above adaxially, 5-10-veined abaxially, 3-5-veined adaxially, base subrounded, sessile, upper margins narrowly serrate winged, apex gradually attenuate into a conic long beak, orifice 2-toothed. Stigmas 2.
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