Japan Flora: Rhizomes short, sparsely branched, culms loosely tufted, 20-40 cm. long, acutely angled, slightly scabrous below the apex; leaf-blades 1.5-3 mm. wide, glaucous- green, flat, soft; head short, ovoid, the bracts scalelike or the lowest one often short-setaceous; spikes 3 or 4, gynec­androus, 4-7 mm. long, contiguous; pistillate scales oval, acute, pale to slightly tawny; perigynia oblong-elliptic, 3.5-4 mm. long, much longer than the scales, glaucous-green, prominently nerved, thick-membranous, abruptly contracted and beakless or nearly so, minutely 2-toothed at tip; stigmas 2.  Sphagnum bogs.

Hokkaido, Honshu (Mount Azuma in Uzen Prov.).  Sakhalin and Kuriles.