Japan Flora: Glabrous, slender, soft annual; culms 30- 120 cm. long, erect, from a decumbent weak base, much branched, straggling, glabrous; leaf-blades linear, flat, slightly scabrous, 5-30 cm. long, 4-12 mm. wide; ligules hyaline, trun­cate, to 0.5 mm. long, glabrous; sheaths smooth, ciliolate; pani- cles large and effuse, loose, rounded-ovate, erect, 12-30 cm. long and as wide, the branches very slender, much branched, spreading, intricate, very loosely spiculose; spikelets pedicelled, elliptic, deep-green and purplish, rather acute, 1.8-2 mm. long; first glume deltoid, acute or rather obtuse, 1/3-2/5 as long as the spikelet, the second and sterile lemma longer, elliptic, sometimes short-puberulent, weakly 5-nerved, thinly mem­branous; fertile lemma elliptic, 1.5-1.8 mm. long, obtuse, lus> trous, smooth, gray-brown when mature.  July-Oct. Wet lowlands.

Hokkaido, Honshu, Shikoku, Kyushu; very com­mon.  Ussuri, Korea, Manchuria, China, Formosa, and India