Japan Flora: Rhi­zomes densely tufted, forming large clumps; culms 20-40 cm. long, slender, decumbent when the achenes are ripe; old leaves persistent and surrounding the neck at base, circinately curved, the new leaves erect, flat, about 2 mm. wide, sparsely hairy, the basal sheaths partially dark red, the ligules scarcely developed; spikes 2-4, erect, approximate, the terminal stami­na te, broadly linear, dark reddish brown, with minutely ciliate scales, the lateral pistillate, oblong, 5-10 mm. long, sessile, the lowest bract auriculate, clasping, not sheathing, shod awned; pistillate scales elliptic, dark reddish brown, minutely ciliate; perigynia as long as and narrower than the scales, ovoid-fusiform, 3-3.5 mm. long, compressed-trigonous, loosely appressed-pilose, gradually narrowed at each end, short- beaked, with a dark brown minutely 2-toothed mouth; stigmas 3. Pine woods in mountains.

Honshu (Mikawa Prov. to Kinki and Chugoku Distr.); rare. Korea.