Japan Flora: Culms tufted, hidden among the leaves, short, to about 15 cm. long; leaf-blades rather short, flat, much longer than the culms, 2-3 mm. wide, deep green, somewhat soft, nearly glabrous, the basal sheaths stramineous; spikes 2-5, the terminal staminate, lanceolate, about 5 mm. long, few­flowered, long-peduncled, the lateral pistillate, all radical ex­cept sometimes the uppermost one which is often approximate to the terminal staminate spikelet, erect, usually oblong, 5-10 mm. long, ped uncled, loosely few-flowered, the bracts leaflike, short-sheathing at base; pistillate scales partly reddish tawny, obovate, obtuse to nearly rounded and mucronate; perigynia longer than the scales, about 3 mm. long, nearly erect, ovoid- fusiform, obtusely 3-angled, sparsely puberulent, many-nerved, extremely short-beaked, with an entire tip.   Apr.-May. Wet open woods on hillsides.

Honshu (Kinki Distr. eastw. to Kanto Distr.); uncommon.