Japan Flora: Rhizomes slender, creeping; culms 20-30 cm. long, glabrous; leaf-blades soft, glabrous, flat, 2-3 mm. wide, the basal sheaths pale; spikes 3 or 4, distant, the terminal staminate, linear, 1-1.5 cm. long, sometimes with a few pistil­late flowers intermixed, the others wholly pistillate, loosely few-flowered, 6-15 mm. long, broadly linear, the bracts leaf­like, longer than the spikes, thinly pubescent, long-sheathing, the peduncles mostly included in the sheaths of the bracts; pistillate scales narrowly oblong, pale, glabrous, mucronate; perigynia slightly longer than the scales, about 6 mm. long, erect, glabrous, light green, nerveless, the beak nearly as long as the body, glabrous, minutely 2-toothed and hyaline at tip; stigmas 3.

Kyushu, Shikoku; rare.