Plants cespitose. Culms 55–80 cm, distally slightly roughened. Leaves 3–4.5 mm wide. Inflorescences: peduncle of terminal spike 0.5–2 cm; proximal bracts shorter or longer than inflorescences; spikes erect, separate, pedunculate, short-oblong or elongate, 15–30 × 9–12 mm; lateral 1–3 spikes pistillate, of varying lengths, mostly shorter than terminal spike or of similar lengths; terminal spike gynecandrous or staminate, 8–25 mm. Pistillate scales lanceolate, shorter and narrower than perigynia, apex acute or mucronate, spinulose. Perygynia veined, broadly ovate, (4.7–)5–6.6 × 2.2–3.4 mm, distal margins serrulate, spinulose, apex gradually beaked; beak 0.5–1 mm, bidentate, teeth spreading, spinulose. Achenes nearly filling body of perigynia.
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