Culms 35–100 cm, angles glabrous or scabrous. Leaves: basal sheaths leafless, usually red-brown; blades amphistomic, 5–8 mm wide, papillose on both surfaces. Inflorescences: peduncle of proximal spike not more than 4 cm; proximal bract longer than inflorescence, 4–8 mm wide. Spikes erect; proximal 2–6 spikes pistillate, 4–6 cm × 4–7 mm, base cuneate or attenuate; terminal 1–3 spikes staminate. Pistillate scales pale red-brown with narrow red-brown marginand broad pale midvein. Perigynia pale brown, veinless, obovoid, 2.6–3.2 × 1.5–2.2 mm, apex rounded; beak pale brown, thickened, not more than 0.2 mm. 2n = 76, 77.
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