Japan Flora: stouter, glabrous, obtusely angled culms, and the shorter bracts not longer than the culm; pcri- gynia ovate or oval, about 4 mm. long, the beak somewhat shorter, the margins scabrous only at tip.---- Apr.-June. Wet places in mountains.
Honshu (Chugoku Distr.), Kyushu. The typical phase occurs in Formosa to sw. China, India, and Malaysia.