Japan Flora: Rather rigid erect perennial; culms 80-150 cm. long; leaf-blades slightly involute, 30-60 cm. long, 7-15 mm. wide, scabrous on the margin, glabrous; sheaths pilose on the collar; ligule 0.5-1 mm. long, truncate; panicles erect, ovate, open at anthesis, 20-40 cm. long, the branches subverticillate, scabrous; spikelets lanceolate, 8-12 mm. long, sometimes purplish, lus­trous; glumes membranous, green, with broad hyaline mar­gins, 3-nerved, smooth, not keeled; lemma 6-8 mm. long, sparingly pubescent, the awn 20-25 mm. long, erect, slightly flexuous at tip; anthers linear, 4-6 mm. long, short-pilose at apex. Aug.-Sept. Edges of woods and grassy slopes in mountains.

Hokkaido, Honshu; rather rare. e. Siberia, n. China, Korea, Sakhalin, and s. Kuriles.