Rhizome short, indurate. Culms 80-100 cm tall, 1.5-2 mm thick, acutely trigonous, smooth, clothed at base with purple-red sheaths disintegrating into reticulate fibers. Leaves shorter than culm, blades pale green, linear, 3.5-5 mm wide, flat, margins scabrous. Involucral bracts leaflike, surpassing inflorescence, sheathless. Spikes 5 or 6; upper 1 or 2 spikes male, linear, with peduncles; remaining spikes female, long cylindric, 55-120 × 4-5 mm, lowest one with peduncle 1-3 cm. Female glumes dark brown, oblong-ovate, 2.5-3 mm, green 3-veined costa excurrent into a scabrous short awn. Utricles slightly longer than or equaling glume, ovate, 2.6-3 × ca. 1.5 mm, veined, apex abruptly contracted into a short beak, orifice emarginate. Nutlets loosely enveloped, obovoid, ca. 1.8 × 1.5 mm; style base not thickened; stigmas 2.
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