Japan Flora: Glabrous to hirsute perennial; culms erect, 50-100 cm. long, tufted, often branched at base, with ciliate nodes; leaf-blades flat, linear, 8-30 cm. long, 5-8 mm. wide, scabrous; ligules truncate, less than 1 mm. long; sheaths glabrous, sometimes spreading-hirsute to -villous; panicles exserted, erect, 5-15 cm. long, the branches very slender, divaricately forked, with short white hairs on axils; racemes peduncled, 5-8 mm. long, bearing a few reddish brown spikelets, the joints ciliate; pedicelled spikele往 lanceolate, staminate, awnless; sessile spikelets lanceolate, acuminate, 2.7-3.2 mm. long, bisexual, flattened, scaberulous; callus with short, wHte hairs; first glume herbaceous, pale green and purplish, slightly lustrous; fertile lemma reduced to a slender, geniculate awn about 18 mm. long. July-Oct. Open places and thickets in low­ lands.

Honshu (Kanto Distr. and westw.), Shikoku, Kyushu; variable. Ryukyus, Formosa, China, Manchuria, Korea, India, Malaysia, and Australia.