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Tufted perennial 3–12 dm; sheaths glabrous or minutely puberulent on the back, usually sparsely ciliate; blades 2–3 mm wide, sparsely pilose above; infl narrow, 5–15 cm, with short erect branches; spikelets 15–30 mm, usually longer than their pedicels, 7–10-fld; glumes subulate, the first 6–8 mm, 1-veined, the second 8–10 mm, 3-veined; lemmas 10–12 mm, conspicuously veined, glabrous or short-hairy, acuminate into an awn 4–7 mm; 2n=28–112. Native of Europe, intr. along roadsides and in waste places from N. Engl. to Mich., Wis., and D.C.
A grass. It keeps growing from year to year. It grows 1 m tall. The lower leaves are flat but the edges roll inwards. They are 6 mm wide. The flower panicles are 15 cm tall.
