Japan Flora: Annual; culms 10-40 cm. long, with 2 or 3 nodes; leaves flat, short-linear, 5-15 cm, long, 3-7 mm. wide, flaccid, short-pointed, the ligule ferrugineous, 1-2 mm. long; inflorescences 1-2； spikelets 3-10, oblong, 4-7 mm. long, 3 mm. wide, dark gray-g比en; scales elliptic, 1.5 mm. long, loosely pilose, grajdsh, hyaline, rounded at apex, the awn about 1 mm. long, recurved; achenes acutely 0.7 mm. long, light brown, mucronate; perianth-segments 6, the inner 3 nearly as long as the achene, squarrose, long-stiped, glabrous, the outer 3 bristle-shaped, very short. Wet places and paddy fields.

Honshu (Shimosa Prov. and Chugoku Distr.), Shikoku, Kyu­shu. s. Korea, Ryukyus, Formosa, China, India, and Ma­laysia.