Japan Flora: Rhizomes creeping, elongate, thickened at the nodes, some­what ligneous; culms soft, 15-30 cm. long; leaf-blades lanceo­late to broadly so, 1-2 cm. wide, flat, 的ft, glabrous or sparsely pilose, the basal sheaths pale cinnamon, the lower ones blade less; spikes rather many, globos&ovoid, androgynous, binate to ternate at the nodes, on unequal erect peduncles, densely few-flowered, 4-6 mm. long and as wide, the staminate part very short and inconspicuous, the bracts bladeless, spathaceous, the sheaths pale or yellowish green, ampliate above; pistillate scales ovate-orbicular, rounded at the apex, pale; perigynia longer than the scales, 2-2.5 mm. long, ascend­ing, ellipsoidal, 3-angled, many-nerved, pale green, glabrous, rounded at the apex and nearly beakless; stigmas 3, thick, short. Apr.-May. Woods in low nwuntains.

Honshu (Kinki Distr. and westw.), Shikoku.