Plants cespitose; rhizomes long. Culms trigonous in cross section, 30–85 cm, scabrous angled distally. Leaves: basal sheaths reddish purple; ligules as wide as to longer than wide; blades light green, glabrous, flat to W-shaped, widest leaves 1.8–4.3(–5) mm wide. Inflorescences 8–30 cm; proximal bract (3–)9–35 cm, mostly equaling or exceeding inflorescence; proximal 1–3 spikes pistillate, erect or, sometimes, the proximal spreading, cylindric; terminal 1–3 spikes staminate. Pistillate scales narrowly ovate, 3.5–5.2 × 1.1–2.1 mm, shorter than perigynia, margins entire, apex obtuse to acute, awnless. Perigynia ascending to spreading, often green or straw colored, strongly 9–12-veined, veins running into beak, lance-ovate, 5.9–10.2 × 2.4–3.3 mm, apex contracted; beak 2.4–4.2(–4.8) mm, bidentate, finely scabrous at least near tip and on teeth, teeth straight, to 0.5–1.4 mm. Stigmas 3. Achenes brown, symmetric, not indented, trigonous, smooth.
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