Japan Flora: Leaves long-petiolate, reniform, 3-6 cm. long, 4-10 cm. wide, somewhat retuse, cordate, obtusely denticulate, pedately 7- to 15-nerved, the petioles 2-5 times as long as the blades; scapes 15-40 cm. long; flowers pedicelled, white, about 12 mm. across, the bracts broadly lanceolate, obtuse; calyx-lobes deltoid-ovate, obtuse, about 8 mm. long; capsules cylindric, 1-1.5 cm. long; seeds about 2.5 mm. long.  July-Aug. Wet alpine slopes. 

Hokkaido, Honshu (n. and centr. distr. on Japan Sea side). s. Kuriles and w, N. America.