Japan Flora: Smooth, glabrous annual; culms erect from ascending base; usually gregarious, 20-60 cm. long; leaf¬blades pale green, 4-15 cm. long, 2-5 mm. wide, ligules thinly membranous, ovate, obtuse, 2-4 mm. long; panicles cylindric, 3-6 cm. long, 5-8 mm. wide, the pedicels 0.3-0.8 mm. long; spikelets narrowly ovate, slightly lustrous, flat; glumes mem¬branous, 3-nerved, nearly free, obtuse, long-ciliate on the keel; lemmas rather thick, rigidly membranous, narrowly ovate, 5-6 mm. long, obtuse, the awn 10-12 mm. long, arising near base, slightly geniculate; anthers pale yellow. May, Paddy fields and wet river banks;

Honshu (Kanto Distr. and westw.), Shi¬koku, Kyushu; common. China.