Japan Flora: Soft, glabrous, tufted annual; culms 20-40 cm. long; leaf¬blades flat, 5-15 cm. long, 1.5-5 mm. wide, pale glaucous green; ligules hyaline, pale, entire, semirounded to ovate, 2-5 mm. long; panicles cylindric, very dense, 3-8 cm. long, 3-5 mm. wide, pale green; branchlets very short, slightly scabrous; spikelets broadly ovate; glumes narrowly obovate, strongly folded, obtuse, 3-nerved, very slightly connate, white-ciliate on the keel, usually appressed-pubescent on the lateral nerve beneath; lemmas nearly as long as the glumes, ovate, smooth, glabrous, obtuse, obscurely 5-nerved, the margins connate be¬low to the middle, the awn slightly exserted, 25-3.5 mm. long, very slender; anthers pale yellow, changing to orange-yellow when dry, 0.6 mm. long. Apr.-June. Cultivated fields and riverbanks; 

Hokkaido, Honshu, Shikoku, Kyushu; a very common weed. Korea, China, and e. Siberia.