Japan Flora: Culms densely tufted, slender, 10-20 cm. long, filiform; leaves filiform, with slighdy involute margins, 0.2-0.8 mm. wide, hairy, acute, the sheaths pale, prominently hairy; inflorescence compound, 3-5 cm. long, the bracts 3-5, the lower 1 or 2 nearly as long as the inflorescence; spikelets numerous, densely many-flowered, lan­ceolate or broadly so, 4-10 mm. long, 1.5 mm. in diameter, acute, ferrugineous; scales thinly membranous, oblong, 1.5-2 mm. long, keeled, obtuse, with a recurved awn 0.5-1 nun. long; achenes light brown, biconvex, obovate, 0.8 mm. long, smooth; style with long, pendent hairs at base; stamen 1, the anther oblong, 0.2 mm. long. Wet places in lowlands. 

Hokkaido, Honshu; common；Korea, Manchuria, China, India, Africa, and s. Europe.