Rhizomes short or inconspicuous. Culms in tufts, 20–75 cm. Leaves green, not glaucous, cauline blades 2–26 cm × 2.2–11.3 mm, membranous. Inflorescnecs: peduncle of terminal spike 0.1–1.6(–14) cm; bracts from shorter than to overtopping terminal spike; ligule of proximal bract 0.5–6.5 mm; longest bract blade (per plant) of distal lateral spike 1.6–4.6(–7.1) cm. Proximal spikes usually arising from distal 1/2 of culms, 5–30 × 4.2–6.6 mm. Terminal spike overlapping and exceeding distal lateral spike, 0.9–3.4(–4.1) cm. Pistillate scales ovate, 2–2.5(–3.1) × 1.4–2.2 mm. Staminate scales with apex acute, occasionally obtuse. Anthers 2.3–3.1 mm. Perigynia olive to brownish green, ellipsoid, oblong-ellipsoid to rhombic-ellipsoid, or obliquely rhomboid, 2.8–4 × 1.3–2.1 mm, (1.6–)1.9–3 times as long as thick; beak 0. 1–0.3(–0.5) mm, orifice nearly entire. Achenes 1.9–2.5(–2.7) × 1.2–1.6 mm. 2n = 36.
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