Japan Flora: Culms rather stout, tufted, 50-70 cm. long; leaf-blades flat, light green, whitish beneath, 5-10 mm. wide, the basal sheaths pale; spikes 4-6, the terminal staminate, elon­gate-linear, light green, 3-6 cm. long, the others pistillate, cylindric, densely many-flowered, erect or nodding, 3-7 cm. long, the upper ones sessile, the lower bracts leaflike, sheath­less; pistillate scales narrowly ovate, very acute, whitish with a green midrib; perigynia longer than the scales, 3 mm. long, spreading, narrowly ovoid, somewhat inflated, membranous, nerved, pale green, glabrous, rather abruptly short-beaked, the tip hyaline, minutely 2-toothed; stigmas 3.  Apr.-June. Woods and thickets in lowlands and in low mountains.

Hok­kaido, Honshu, Shikoku, Kyushu; common. Korea, China, Ryukyus, Formosa, Malaysia, and India.