Japan Flora: Rhizomes short and thick, short-creeping; culms loosely tufted, rather thick, 40-80 cm. long; leaf-blades rather soft and thin, broadly linear, 4-10 mm. wide, slightly glaucous, flat, the basal sheaths bladeless, cinnamon-colored, not keeled, soft, not splitting into fibers; terminal spike staminate or gynecandrous, the lateral 2-5, approximate, pendulous, terete, very densely many-flowered, yellowish green, sometimes the lowest one distant and long-peduncled, the lower 1-3 bracts leaflike, longer than the culm; pistillate scales ovate, pale, acute; perigynia longer than the scales, 2.5-3 mm. long, ascending, biconvex, somewhat turgid, glabrous, nearly nerve­less, abruptly short-beaked, the beak slightly recurved; stigmas 2. May-June. Wet mountain slopes.

Hokkaido, Honshu, kyushu (n. distr.). s. Kuriles and Korea (Ullung Isl.).