Japan Flora: Very variable, rhizomatous perennial; culms erect, 30-80 cm. long, smooth, rather firm; leaf，blades nearly flat to loosely involute, 7-20 cm. long, 2-4 mm. wide, usually glabrous; ligules truncate, 1-2 mm. long; panicks narrowly ovate, 8-15 cm. long, contracted, densely spiculose, erect, the branches subverticillate, scabrous; spikelets ovate, 3-6 mm. long, 3- to 5-flowered; glumes slightly unequal, acute, scabrous on the keel, the lower lanceolate, 1-nerved, 1.5-2 mm. long, the upper broadly lanceolate, 3-nerved, 2-2.5 nun. long; lemmas about 3 mm. long, acute, glabrous on the sides, the intermediate nerves distinct, the keel and marginal nerves pubescent on lower of the entire length, the web copious; anthers 0.8-1.2 mm. long. May-July. Spontaneous in mountains, although believed to be naturalized, very common in lowland pastures and parks.

Hokkaido, Honshu, Shikoku, Kyushu.  Eurasia.