Japan Flora: Rhizomes stout, short-creeping; radical leaves tufted, ovate- cordate, the blades 3-10(-15) cm. long and as wide, irregularly acute-toothed, nearly glabrous, the petioles 10-35 cm. long; scapes 15-80 cm. long, often with 1(-3) small leaves, loosely curly-pubescent; panicles 15-40 cm. long, rather loosely many-flowered; flowers white, the pedicels 5-20 mm. long; calyx-lobes ovate, recurved, obtuse; petals obliquely spreading, ovate, obtuse, 3-4 mm. long; stamens slightly longer than the petals, the filaments nearly linear, the disc surrounding the base of the ovary; capsules 10-12 mm. long, the carpels erect, obliquely ascending on the upper part; seeds fusiform, about 1 mm. long, longitudinally mammillate-ribbed, the tail at each end as long as the body. July-Aug. Wet rocks, stream banks and ravines in mountains;

Hokkaido, Honshu (n. and centr. distr.), Shikoku.