Japan Flora: Rhizomes tufted; culms 40-60 cm. long, slender, glabrous, acutely angled; leaf­blades 4-8 mm. wide, cinereous-green, nearly smooth, the basal sheaths bladeless, castaneous, fibrous; spikes 3 to 5, nod­ding or somewhat pendulous, approximate, the terminal staminate, linear, the lateral pistillate, cylindric, 2-5 cm. long, the lower slightly nodding on rather long, nearly smooth peduncles, the lowest bract leaf like; pistillate scales oblong, truncate, pale or somewhat yellowish, the 3-nerved midrib prolonged into a short awn; perigynia longer than the scales, elliptic, 2.5-3 mm. long, somewhat turgid, biconvex, light green or yellowish, few-nerved, abruptly very short-beaked, with an emarginate tip. May-June. Wet slopes.

Yezo, Honshu; rather rare.