Japan Flora: Deep green slender annual, nearly glabrous throughout; culms long-creeping, branching, erect in upper part, smooth, often purplish; leaf-blades thin, flat, broadly linear, 4-7 cm. long, 4-10 mm. wide, with few long hairs near the base; ligules 1-1.5 mm. long; sheaths smooth, usually glabrous; racemes 2-4, digitate, slender, spreading, the rachis 4-7 cm. long, smooth on margins; spikelets lanceolate, 2.8-3 mm., rarely 2.5 mm. long, acuminate, green; first glume nearly absent, the second membranous, lanceolate, 3-nerved, pubescent, 3/5-2/3 as long as the spikelet; sterile lemma lanceolate, acuminate, 5-nerved, pubescent toward the margin; fertile lemma herba­ceous, lanceolate,  acuminate, pale green, as long as the sterile one. July-Oct. Shaded places near dwellings.

Honshu (Kanto Distr, and westw.), Shikoku, Kyushu; rather com­mon. s. Korea, Ryukyus, Formosa, China, Indochina, Malaysia, and Micronesia.