Japan Flora: Rhizomes slender, long-creeping; culms 15-30 cm. long, glabrous; leaf­blades linear, longer than the culms, 2-3 mm. wide, soft, flat, the basal sheaths membranous, pale, usually indistinctly punctate-puberulent, the lower ones bladeless and ferrugineous, the ligules oblique, ferrugineous; spikes 7-9, erect, 1-2 cm. long, pedunculate, androgynous except the terminal one, fre­quently binate to ternate at each node, sometimes sparingly branching at base, the pistillate loosely 1- to 3-flowered, the bracts leaf-like, with an inflated sheath at base, at least the lowest one much longer than the inflorescence; scales of both sexes nearly alike, oblong, very obtuse, pale ferrugineous; perigynia 3 mm. long, ovate-rhomboid, 3-angled, mem- branous, gray-green, inconspicuously nerved, abruptly nar­rowed at each end, short-beaked, with an emarginate tip; stigmas 3, rather thick.  Apr.-May. Mountains.

Shikoku (lyo Prov.); rare.