Japan Flora: Tufted green perennial; culms erect, 30-60 cm. long, usually smooth; leaf-blades flat or loosely involute, 5-15 cm. long, 1.5-3 mm. wide, green, the uppermost shorter than the sheath; ligules semirounded to truncate, 1-2 nun. long; panicles narrow, erect, dense, green, 8-15 cm. long, 1.5-3 cm. wide, the branches 3- to 5-nate, scabrous; spikelets 4-5 mm. long, 2- or 3-flowered; glumes rather unequal, 3-nerved, acuminate, about 3 mm. long; lemmas green, bronzed toward the margin, 3 mm. long, acute, glabrous, with delicate intermediate nerves, the keel pubescent on lower half, the marginal nerves pubescent near base, the web rather short, not copious; anthers about 1.5 mm. long.  May-June. Hills and low mountains.

Hokkaido, Honshu (Kinki Distr. and northw.). Korea, Manchuria, Sakhalin, and s. Kuriles.