Rhizome slender, creeping. Culms 10-27 cm tall, slender, compressed trigonous, smooth or slightly scabrid. Basal sheaths brown, split into fibers. Leaves shorter than culm, blades 1.5-2.5 mm wide, flat, soft, margins scabrid. Involucral bracts bristlelike, lowest equaling or longer than subtending spike, sheathed, sheath 4-8 mm. Spikes 2-4, upper ones ± contiguous; terminal spike male, narrowly lanceolate or oblanceolate, (5-)8-18 × 1.5-2 mm, with peduncle 8-15 mm; lateral spikes female, oblong or shortly cylindric, 8-15 × 2-3 mm, slightly loosely flowered, with peduncles 6-20 mm. Female glumes pale rusty colored, obovate to ovate, ca. 2.5 mm, green costa 1-3-veined, margins white membranous, apex acute or obtuse. Utricles pale yellow-green, slightly longer than glume, ovate-elliptic, obtusely trigonous, 2.5-3 mm, sparsely puberulent at upper part, distinctly and slenderly many veined, base narrowly cuneate, apex attenuate into a conic beak, orifice emarginate abaxially and truncate adaxially. Nutlet tightly enveloped, elliptic, trigonous, ca. 1.8 mm, base shortly stipitate, apex discoid-annulate; stigmas 3. Fl. and fr. Jun-Jul.
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