Rhizome long creeping, subterete, clothed with brown scales. Culms ca. 20 cm tall, slender, trigonous, slightly scabrous above, clothed with brown or pale brown sheaths at base. Leaves ± equaling culm, blades linear, 2-3 mm wide, flat, margins slightly scabrous, apex acuminate. Involucral bracts glumelike. Spicate inflorescence oblong, 1-2 cm, sometimes interrupted below; spikes androgynous or gynaecandrous, sometimes lower ones female, ovate. Female glumes pale or slightly ferruginous, green at middle, lanceolate, ca. 2.3 mm, margins white hyaline, apex acute. Utricles yellowish green, longer than glume, ovate, plano-convex, 3-4 mm, membranous, many veined abaxially, faintly 3-5-veined adaxially, base subrounded, shortly stipitate, upper margins narrowly serrulate winged, apex gradually attenuate into a long beak, orifice membranous, obliquely truncate, 2-toothed. Nutlets somewhat tightly enveloped, oblong, ca. 1.3 mm; stigmas 2. Fl. and fr. Jun-Jul.
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