Japan Flora: Culms slender, in small tufts, erect, 20-60 cm. long, nearly smooth; leaf-blades 1-1.5 mm. wide, glaucous-green, narrow, nearly flat; head densely capitate, deltoid, 5-8 mm. long, the bracts scalelike; spikes 2 or 3, gynecandrous, obovoid- globose, 3-6 mm. long, few-flowered; pistillate scales obtuse, pale, more or less translucent, somewhat lustrous, persistent; perigynia ovate, planoconvex, as long as the scales, 3-3.5 mm. long, glaucous-green to gray, faintly many-nerved, smooth, beakless, with an entire tip; stigmas 2；May-July. Sphag­num bogs.

Hokkaido, Honshu (Nikko in Shimotsuke Prov.).   Sakhalin, Kuriles, Korea, and widely distributed in the N. Hemisphere