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Information Culms 11–40 cm, glabrous on angles. Leaves: proximal sheaths brown, fronts with pale brown spots, veinless, with blades, glabrous; leaf blades 3–6 mm wide. Perigynia obovoid.

Information Culms 11–65 cm, scabrous on angles. Leaves: proximal sheaths red-brown, fronts with pale brown spots, veinless, with blades, glabrous, backs scabrous; blades 3–6 mm wide. Perigynia ellipsoid to obovoid, apex obtuse or rounded. 2n = 72–80.

Information Plants not cespitose. Culms acutely angled, 10–90 cm, glabrous. Leaves: basal sheaths red-brown; sheath apex U-shaped; blades hypostomic, glabrous, 3–6 mm wide. Inflorescences: proximal bract shorter than inflorescence, 0.5–3 mm wide. Spikes erect; proximal 2–4 spikes pistillate, 1–2.5 cm × 3–5 mm, base cuneate; terminal 1–2 spikes staminate. Pistillate scales purple-brown, equaling perigynia, apex obtuse or acute, awnless. Perigynia ascending, pale brown with red-brown spots on apical 1/2, veinless, somewhat flattened, loosely enclosing achenes, ellipsoid or obovoid, 2–4 × 1.2–2.3 mm, dull, apex obtuse or acute, papillose; beak red-brown, 0.2–0.3 mm. Achenes not constricted, dull.

Information Culms 35–90 cm, scabrous on angles. Leaves: proximal sheaths red-brown, fronts with (red) pale brown spots, prominently ladder-fibrillose, bladeless, glabrous, backs scabrous; leaf blades 3–6 mm wide. Perigynia ellipsoid to obovoid, apex acute. 2n = 74.