Rhizomes short or inconspicuous. Culms in dense tufts, 13–70(–100) cm. Leaves not green, usually glaucous, cauline blades 2–27 cm × 1.2–5.3 mm. Inflorescnecs: peduncle of terminal spike 0.1–3.5 cm; bracts (middle and distal ones) overtopping spikes; ligule of proximal bract (2–)3–17.5(–26) mm; longest bract blade (per plant) of distal lateral spike 4.1–15.8 cm. Proximal spikes usually arising from distal 1/2 of culms, 6–27(–32) × 3–6 mm. Terminal spike 6–35(–43) mm, shorter than to barely exceeding and overlapping distal lateral spike. Pistillate scales ovate or ovate oblong, 1.4–2.5(–2.9) × 0.8–1.4 mm. Staminate scales with apex acute to acuminate or cuspidate. Anthers 1.6–2.9 mm. Perigynia olive to yellowish green or at age yellowish brown, elliptic-or oblong-ovoid to obovoid, 2.2–3.1(–3.7) × 1.2–1.8(–2) mm, 1.4–2.2(–2.4) times as long as thick; beak 0.1–0.3 mm, orifice nearly entire. Achenes 1.8–2.3 × 1–1.4 mm. 2n = 36, 38, 40, 42.
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