Japan Flora: Culms long-creeping and branched at base, erect to ascending, 20-50 cm. long, slender, leafy, the nodes pilose; leaf-blades flat, narrowly ovate; 2-6 cm. long, 1-2.5 cm. wide, short-acuminate, cordate and clasping at base, ciliate, glabrous or pilose on both sur­faces; ligules truncate, lacerate, 1-2 mm. long; sheaths short, ciliate, usually hirsute; inflorescence flabellate, long-exserted, with 3 to 20 racemes, these often branched at base, nearly sessile, 3-5 cm. long; rachis-joints usually glabrous; spikelets pale green to purple, lanceolate, acute, the strong nerves aculeate-scaberous; sterile lemma awnless or with a geniculate awn; anthers 0.5-1 mm. long. Sept-Nov. Low mountains and lowlands

Hokkaido, Honshu, Shikoku, Kyushu; very common and variable. e. and tropical Asia