Japan Flora: Soft, green, loosely tufted herb, blackish when dried; culms 15-30 cm. long, glabrous, soft; leaf-blades soft, thin, vivid green, 2-3 mm. wide, the basal sheaths pale; spikes 3 or 4, cauline, the termi­nal staminate, few-flowered, nearly sessile, 5-10 mm. long, the others pistillate, oblong, 5-10 mm. long, approximate, the lower ones distant, the peduncles scarcely exserted from the sheaths of short-bladed bracts; pistillate scales pale green, nar­rowly obovate, obtuse, the green midrib exserted and mucro­nate; perigynia longer than die scales, broadly ovoid, 2.5-3 mm. long, thin-membranous, several-nerved, with few trans­verse wrinkles on the sides, abruptly short-beaked with an emarginate tip. Apr.-May. Open woods in hillsides and low mountains.

Hokkaido (rare), Honshu, Kyushu.