Plants not cespitose. Culms acutely angled, 10–90 cm, glabrous. Leaves: basal sheaths red-brown; sheath apex U-shaped; blades hypostomic, glabrous, 3–6 mm wide. Inflorescences: proximal bract shorter than inflorescence, 0.5–3 mm wide. Spikes erect; proximal 2–4 spikes pistillate, 1–2.5 cm × 3–5 mm, base cuneate; terminal 1–2 spikes staminate. Pistillate scales purple-brown, equaling perigynia, apex obtuse or acute, awnless. Perigynia ascending, pale brown with red-brown spots on apical 1/2, veinless, somewhat flattened, loosely enclosing achenes, ellipsoid or obovoid, 2–4 × 1.2–2.3 mm, dull, apex obtuse or acute, papillose; beak red-brown, 0.2–0.3 mm. Achenes not constricted, dull.