Plant gray-green. Rhizome long and creeping. Culms 35-58 cm tall, acutely trigonous, scabrous, clothed at base with brown bladeless sheaths. Leaves longer than or equaling culm, blades linear, 2.5-3.5 mm wide, flat. Involucral bracts glumelike. Spicate inflorescence rather small, 1-1.8 cm; spikes 5-9, ovate-lanceolate, 3-4 mm, upper and lower spikes female, male in middle, rarely mixed spikes, oblong-ovate, 4-5(-6) mm. Female glumes yellowish brown, oblong-ovate, margins pale hyaline, apex acute. Utricles brown, longer than glume, ovate-lanceolate or lanceolate, plano-convex, 3.5-4.5 mm, subleathery, pubescent on both faces, sometimes sparsely puberulent at base, faintly 3-6-veined abaxially, nearly nerveless adaxially, base cuneate, shortly stipitate, margins narrowly serrate winged, apex gradually attenuate into a long beak, orifice 2-toothed. Style base curved; stigmas 2. Fr. Jul-Aug.
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