Culms 15–55 cm. Leaves mostly basal; basal sheaths pale to dark brown; blades of flowering stems yellowish green, flat, shorter than stems, widest blades 3–4.6 mm wide, margins scabrous. Inflorescences: longer peduncle of terminal spike 1–2(–4) cm; proximal bract mostly equaling or no more than 1.5 times as long as inflorescence; pistillate spikes (2–)3–5, ascending, ovoid to short-cylindric; distal 1 or 2 pistillate spikes aggregated near staminate spike; the proximal widely separated, pedunculate; terminal staminate spike 8–25(–30) × 2 mm. Pistillate scales brown to reddish brown, with green or whitish midrib. Staminate scales brown, ovate-elliptic, margins scarious, apex obtuse or mucronate. Anthers 1.5–2.7 mm. Perigynia yellowish green, 2.6–3.5 × 1–1.3 mm, apex gradually tapered; beak 0.4–0.7 mm, smooth.
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