Loosely tufted from a knotty rhizome, 4-10 dm; principal lvs cauline, scaberulous above, pubescent beneath, the blades mostly 10-20 cm נ8-15 mm, with many fine veins; lower lvs ±reduced, the basal sometimes to mere sheaths; ligule minute or none; panicle sparsely branched, 1-2 dm, the few straight branches spreading or ascending, bearing the few appressed spikelets toward the end; glumes herbaceous, narrowly elliptic, acute or short-acuminate, 7-9 mm, distinctly 7-veined; lemma 5.5-7 mm, dark brown and shining; awn 12-22 mm; 2n=46, 48. Dry to moist woods and wooded dunes; Que. to Ont., Minn., and N.D., s. to Va., Ky., Mo., and Nebr. (Piptatherum r.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.