Plants colonial. Culms curved, bluntly trigonous, 2–12 cm, smooth-angled distally. Leaves: basal sheaths brown; ligules 0.3–0.6 mm; blades involute, ± equaling culms, 0.5–1.5 mm wide. Inflorescences 0.5–1.2 cm; spikes (3–)5–7, essentially indistinguishable in dense hemispheric head. Pistillate scales brown to dark brown, with narrow whitish hyaline margins, ovate, conspicuously shorter than perigynia, apex ± acute to acuminate, body shiny. Anthers 0.9–1.4 mm. Perigynia light brown proximally, dark brown distally, usually strongly 8–11-veined abaxially, 4–11-veined adaxially, not or little inflated, narrowly elliptic, 2.9–3.9 × 1–1.5(–1.6) mm, leathery, dull to satiny; stipe 0.2–0.4 mm; beak poorly defined, 0.4–0.9 mm, smooth or slightly scabrous-margined.
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