Japan Flora: Rhizomes short, plant rarely stoloniferous; culms 30-100 cm. long; leaf-blades narrowly linear, elongate, rather flat, 3-7 mm. wide; ligules very short; panicles narrowly ovate, 10-20 cm. long, the branches ascending, geminate, scabrous; spikelets pale green, 8-12 mm. long, 5- to 8-flowered; glumes lanceolate, rather acute to obtuse, the lower 2-3 mm., the upper 35-4.5 mm. long; lemmas chartaceous, narrowly ovate, 5-7 mm. long, nearly acute, glabrous, obscurely 5-nerved, nearly as long as the palea; anthers about 3 mm. long; ovary glabrous.  June-Aug. Naturalized.

Hokkaido (common), Honshu, Shikoku, Kyushu. Europe and Siberia.