Japan Flora: Rhizomatous, the roots smooth, white, fibrous; culms 20-30 cm. long, glabrous; leaf-blades erect, cinereous-green, rather flat, 2-3 mm. wide, the sheaths partially grayish brown; spikes 2-4, erect, the terminal staminate, lanceolate, reddish brown, 1-1.5 cm. long, the others pktillate, short-cylindric, few-flowered, short- peduncled, 1-2 cm. long, the bract leaflike, longer than the spikes, very short-sheatliing; pistillate scales elliptic, obtuse, light brown, deciduous; perigynia slightly longer than the scales, ovoid, 4 mm. long, erect, 3-angled, glaucous, densely puncticulate, inconspicuously nerved, nearly beakless, with a ferrugineous entire tip; stigmas 3. July. Bogs in high mountains.

Hokkaido (Mount Taisetsu). Korea, Kuriles, and widely occurring in northern part of the N. Hemisphere.