Japan Flora: Slender annual; culms 40-100 cm. long from a decumbent, branched, rooting base, glabrous; leaf-blades thin, flat, lanceolate, 4-10 cm. long, 8-15 mm. wide, short-acuminate, obliquely cuneate at base; ligules truncate, about 0.5 mm. long, puberulent on back; sheaths pubescent at least on outer margin above, d'orter than the leaf-blades and internodes of culms; inflorescence at length exserted; racemes 1-3, nearly erect to ascending, straight, green, 5-7 cm. long, the rachis joints rather thick, 3-angled, 3.5-5 mm. long, thickened above, short-pilose on the angles; pedicels about 2/3 as long as the spikelets; spikelets green, 4-8 mm. long, the pedicelled ones somewhat flattened laterally, the sessile ones with a shallow groove on the face between the 2 ciliate keels; awn long-exserted, to 15 mm. long；Sept.-Oct. Woods in lowlands and in low mountains.

Hok­kaido, Honshu, Shikoku, Kyushu; common. Korea, China, Ryukyus, Formosa, Malaysia, India, and the Caucasus.