Japan Flora: Perennial; culms erect, ascending or shortly decumbent at base, 30-60 cm. long, glabrous; leaf­blades firmly membranous, flat, broadly linear, 4-7 cm. long, 3- 7 mm. wide, gradually acuminate, scabrous, with slightly thickened margins, nerves not prominently raised; ligule a series of short hairs; sheaths rather short, glabrous; panicles erect, open, 3-6 cm. long, the branches slender, elongate, loosely branching, the pedicels with a pale yellow, obscure gland, thickened at apex; spikelets broadly obovate to obovate- globose, 2-2.2 mm. long, rounded at apex, pale green, some­times slightly purplish, slightly lustrous; glumes equal, broadly elliptic, obtuse, weakly nerved, smooth or slightly scabrous above, firmly membranous; lemmas as long as to slightly longer than the glumes, elliptic, unequal, somewhat coria­ceous, pale yellow, rounded at apex, glabrous to puberulent on margin. June-Aug. Wet places.

Hokkaido, Honshu, Shi­koku, Kyushu. Ryukyus, Formosa, China, se. Asia, Ma­laysia, Micronesia, and Australia.