Japan Flora: Plant densely tufted; culms 20-40 cm. long, slender; leaf-blades flat, green, 2-3 mm. wide, the basal sheadis light brown, somewhat lustrous, fibrous, the fibers sparsely covering the neck of the rhizome; spikes usually 3, distant, the terminal staminate, linear, long-peduncled, 2.5-3 cm. long, pale greenish yellow, the others pistillate, mostly loosely flowered, 2-3 cm. long, broadly linear, the bracts short, rather long-sheathing; pistil­late scales narrowly oblong, truncate or emarginate and mu­cronate; perigynia longer than the scales, 4 mm. long, sub­erect, oblong-ovoid, faintly but distinctly nerved, sparsely pubescent, rather long-beaked, minutely 2-toothed at apex; stigmas 3. Apr.-May. Open woods on hillsides and in low mountains. 

Honshu (Musashi, Kai, Mikawa, Owari, and Mino Prov.).