Japan Flora: Rhizomatous; culms 20-40 cm. long, slender, glabrous; leaf-blades soft, 1.5-2.5 mm. wide, the sheaths pale or light brownkh; spikes 2 or 3, loose, the terminal staminate, linear, 1.5-2.5 cm. long, tawny, the lateral pistillate, oblong to narrowly so, rather densely flowered, pendulous on long peduncles, the lowest bract short, leaflike, long-sheathing; pistillate scales oval, very obtuse, reddish cupreus; perigynia as large as the scales, ascending, ovoid, more or less compressed-trigonous, glaucous, densely puncticu- late, indistinctly nerved, abruptly short-beaked, with a fer­rugineous entire tip; stigmas 3.  Bogs.

Hokkaido, Honshu (Rikuchu Prov.); rare.  n. Korea, Kuriles, and Siberia to Europe.