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Colonial by creeping rhizomes, forming a turf; stems slender, 4– 10 dm, purplish at base; lvs pale green, stiff, elongate, involute, 1–3 mm wide; ligule much wider than long; staminate spike usually solitary; pistillate 1, or 2 or 3 and widely separated, sessile or nearly so, ovoid to short-cylindric, 1–2 cm; lowest bract lf-like but not sheathing; perigynia 3–15(–18), ovoid and somewhat inflated but also compressed, 4–7 mm, half as thick, strongly several-nerved, abruptly narrowed into an emarginate beak 1–2 mm; achene trigonous, obovoid, 2–3 mm; style persistent, usually contorted at base; 2n=76. Grassy bogs and wet meadows; Nf. to Mack., s. to Conn., Pa., Ind., and Wis.
