Japan Flora: Rhi­zomes densely tufted, the neck rather densely covered with dark brown fibers; culms 30-50 cm. long, slender; leaf-blades 4-6 mm. wide, flat, stiff; spikes 3 or 4, distant, erect, the termi­nal staminate, linear, 2-2.5 cm. long, the lateral pistillate, broadly linear, loosely flowered, 1.5-2 cm. long, peduncled, the bracts setaceous, sheathing at base; pistillate scales obovate, pale green, obtuse, the green midrib sometimes excurrent as a mucro; perigynia longer than the scales, 35-4.5 mm. long, oblong-fusiform, the beak moderately elongate, minutely 2- toothed; Apr.-June.

Honshu (Kinki Distr. and westw., mainly on the Japan Sea side), Kyushu (n. distr.)