Japan Flora: Rhizomes densely tufted, forming large clumps, with ascending short innovations; culms few to rather many, 30-50 cm. long; leaf-blades stiff, coriaceous, lustrous, 5-JO mm. wide, the margins revolutc and prominently scabrous, the basal sheaths castaneous, splitting into brown fibers; spikes 3-6, the terminal staminate, thick-clavate, 3-6 cm. long, densely many-flowered, castaneous, the lateral androgynous, short서:ylindric, densely many-flowered, peduncled, the lower bracts leaflike, long-sheathing; pistillate scales oblong, dark or yellowish brown, emarginate and a'vned; perigynia 5-6 mm. long, obliquely spreading, oblong-elliptic, somewhat coriaceous, indistinctly 3-angled, glabrous, many-nerved, with a rather long deeply bifid beak, the teeth slightly curved; achenes with a curved beak; stigmas 3.  Rocks near sea­ coasts.

Honshu (Noto and Awa Prov. westw.), Shikoku, Kyushu. s. Korea, Ryukyus, China, and Bonin Isis.