Japan Flora: Annual; culms 10-60 cm. long; leaf-blades linear, flat, 3-5 mm. wide, short-pubescent; panicles erect, 5-10 cm. long, the branches short, erect, short-pubescent; spikelets oblong, densely 6- to 10-flowered, 1-1.5 cm. long; glumes obtuse, puberulent, the lower 3- to 5-nerved, broadly lanceolate, 5-6 mm. long, the upper 5- to 7-nerved, oblong, 3-8 mm. long; lemmas membranous, elliptic, 7-8 mm. long, obtuse, 7-nerved, short-pubescent, the awn 6-9 nun. long, between the teeth; palea shorter than the lemma; anthers about 2 mm. long.
Naturalized in Hokkaido and Honshu. Europe and Siberia.