Culms solitary or few in a tuft, erect, to 1 m; main lvs 3–8 mm wide; ligule 2–6 mm; infl 1–3 dm, diffuse, with drooping branches bearing spikelets mostly toward the tip; spikelets broadly ovate, 4–8 mm, 5–10-fld; glumes scarious-margined, the first lanceolate, 1.6–2.4 mm, the second broadly ovate, 2.1–2.3 mm; lemmas broadly ovate, with visible but not raised veins, 2.9–4 mm, the thin or scarious margins not covering the sides of the round-obovate palea, the acute tip projecting 0.5 mm beyond the palea; stamens 2; 2n=60. Swamps, bogs, and wet woods; Nf. to Minn., s. to N.J. and Ill.
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