Japan Flora: Rather glabrous perennial; rhizomes elongate, covered by coriaceous, short scales; culms 50-80 cm. long, branching below, glabrous; leaf-blades thin, flat, broadly linear, 20-40 cm. long, 5-15 nun. wide, acuminate, scabrous; ligules very short, ciliolate; sheaths ciliate; panicles 15-30 cm. long, narrow, linear to narrowly lanceolate, sca­brous, the branches short, spreading, loosely flowered; spikelets ovate, 2-2.2 mm. long, acute, green or yellowish green; first glume 2/5-1/2 as long as the spikelet, the second 2/3 as long, 5-nerved, ovate, acute; sterile lemma 5-nerved, acute; fertile lemma as long as the sterile one, 2-2.2 mm. long, narrowly ovate, mucronately acute, smooth and lustrous. Aug.-Oct. Thickets and woods in lowlands;

Honshu (Uzen, Kanto, Etchu Distr. and westw.), Shikoku, Kyushu; rather common. s. Korea and China.