Japan Flora: Rhizomes short; culms soli­tary, with 1-3 nodes, 15-40 cm. tall; radical leaves flat, broadly linear, 3-6 mm. wide, long-attenuate, obtuse at tip, the cauline 3-7 cm. long, the sheath 3-4 cm. long, loosely surrounding the culm at base; inflorescence terminal, compound, 3-5 cm. long, nodding on one side, the bracts 1 or 2, short, the rays scabrous; spikelets oblong, rarely in capitate clusters of 1-3, 7-10 mm. long, 3-4 mm. thick, dark gray; scales membranous, 3.5-4 mm. long, very obtuse; achenes broadly obovate, 1.3 mm. long, the bristles 6, flexuous, 5-6 mm. long, sparsely spinulose at tip; anthers 2-3 mm. long. July-Aug. Wet places in high mountains.

Hokkaido, Honshu (n. & centr. distr.). s. Kuriles, Sakhalin, Korea, and Ussuri.