Japan Flora: Rhizomes short; culms loosely tufted, 40-60 cm. long, acutely angled, sparsely scabrous in upper part; leaf-blades 3-4 mm. wide, flat, glaucous-green, nearly smooth; spikes 6 or 7, gynecandrous, ovoid-globose, 5-8 mm. long, the upper ones approximate, the lower distant, forming a more or less flexuous elongate head, the bracts scalelike; pistillate scales rather obtuse, red-castaneous, paler toward the margins; perigynia longer than the scales, elliptic, 3 mm. long, tawny, ferrugineous at maturity, scabrous in upper part, strongly compressed, with acute margins, several-nerved, very short- beaked and minutely 2-toothed at tip; stigmas 2June-July. Wet grassy places.

Hokkaido, Honshu (Ozegahara Moor in Kodzuke); rare. Sakhalin.