Japan Flora: Rhi­zomes tufted; culms hidden among the leaves, 5-10 cm. long, slender; leaf-blades fresh green, soft, flat, 3-5 mm. wide, the sheaths pale; spikes 3 or 4, the terminal staminate, pe- duncled, pale green, the others pistillate, short-cylindric to oblong, 5- to 10-flowered，all but the uppermost radical, the bract on the culm sheathing, short-pointed; pistillate scales obovate-elliptic, broadly rounded, pale; perigynia twice as long as the scales, 4 mm. long, acutely 3-angled, very weakly nerved, pale green, membranous, sparsely puberulent, grad­ually narrowed to a stipelike base nearly as long as the body, rather abruptly short-beaked, with a minutely 2-toothed hya­line apex; stigmas 3, short.  Apr.-May.

Honshu (Omi, Mino, Hida and s. Shinano Prov.); rare.