Rhizome slender, creeping or obliquely ascending, clothed with red-brown and bladeless sheaths. Culms tufted, 20-40 cm tall, slender, compressed triquetrous, smooth on lower part, scabrous on angles of upper part, red-brown sheathed at base. Leaves shorter than culm, blades 1-1.5 mm wide, flat, scabrous on upper surface and margins, sheathed; sheaths usually split at one side. Lowermost involucral bract leaflike, linear, upper ones scalelike, aristate, not sheathed. Spikes 2 or 3, congregated at top of culm, lowermost one slightly remote; terminal spike male, clavate or linear, 0.8-1.2 cm, subsessile; lateral spikes female, globose or broadly ovate, ca. 5 mm, few flowered, sessile. Female glumes brownish, broadly ovate, 2.2-2.5 mm, 1-veined, margins hyaline, apex acuminate. Utricles yellowish green, slightly pale brown at base and near apex, obliquely patent, slightly longer than or equaling glume, obovate, obtusely trigonous, 2.5-2.8 mm, herbaceous, densely hispidulous, not veined or indistinctly few veined at base, base cuneate, margins hyaline, apex abruptly contracted into a rather short beak, orifice obliquely truncate or emarginate. Nutlets yellowish, tightly enveloped, subelliptic or elliptic-obovate, obtusely trigonous, ca. 2 mm, apex mucronate; style base not thickened; stigmas 3. Fl. and fr. Jun-Jul.
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