Plants cespitose; rhizomes short. Culms central, trigonous, 30–90 cm, smooth. Leaves: basal sheaths reddish purple tinged; ligules 6–17 mm; blades green, M-shaped, 3–8 mm wide, pubescent abaxially and on apex of inner band of distalmost sheaths, glabrous or nearly so adaxially, especially distally. Inflorescences 7–20 cm; proximal 2–4 spikes pistillate, ascending; distal spikes erect; terminal 1–2 spikes staminate. Pistillate scales ovate, apex acute, pubescent abaxially, ciliate. Perigynia ascending, purplish tinged distally, ± veinless except for 2 main ribs, ovoid, 3–4 × 1.2–1.8 mm, pubescent; beak 0.3–0.8 mm, ± irregularly bidentulate or erose, hyaline, ciliate.
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