Japan Flora: Rhi­zomes scarcely evident; culms tufted, 20-50 cm. long, soft, terete, slender; basal sheaths cylindric, the mouth hyaline- translucent, obliquely truncate, sometimes cuspidate; in­florescence capitate, pseudolateral, of 3-10 sessile spikelets; bract 1, 7-10 cm. long, continuous with the culm; spikelets broadly ovoid, 5-8 mm. long, 3-4 mm. wide, obtuse, light green; scales elliptic, membranous, 2.5-3 mm. long; stigmas 2; achenes broadly obovate, 1.2-1.5 mm. long, flattened, dark brown, nearly smooth; bristles 4 or 5, 1J4 times as long as the achene, retrorsely scabrous; anthers 0.3 mm. long. July-Sept.

Hokkaido, Honshu (Kai, Mutsu). Korea, Northeast China, and Ussuri.