Japan Flora: Un­armed dioecious herb, with branched, slender rhizomes; stems erect, 10-25 cm. long, simple, 2- or 3-leaved, slightly soft- pubescent, with few scalelike leaves at base; leaves deep green, reniform-orbicular, cordate, 4-7 cm. long and as wide, shal­lowly (3-)5-lobulate with depressed rounded lobes, nerves above palmately impressed, loosely appressed-pubescent to gla­brate on upper side, spreading-pubescent beneath especially on nerves, the stipules membranous, 3-7 mm. long, obtuse; flow­ers unisexual, solitary, terminal; calyx-lobes narrowly ovate or elliptic, obtuse to rounded, soft-pubescent, sometimes with a few glandular hairs; petals white, 8-10 mm. long; stones about 3 mm. long, obsoletely striate on upper portion. June-July. Sphagnum bogs.

Hokkaido, Honshu (n. distr.). Kuriles, Sakhalin, and n. Korea to Europe and N. Amer­ica.