Japan Flora: Leaves rhombic-orbicular to depressed-orbicular, 7-17 cm. long and as wide; sepals broadly lanceolate to narrowly ovate, subacute, green, herbaceous, 2-2.5 cm. long; petals white, ovate, subacute, slightly longer than the sepals; anthers (4-) 6-8 mm. long, the connective slightly produced above, the filaments 3-8 mm. long; ovary conical-ovoid; stigma rather thick; berry about 15 mm. in diameter. Apr.-June. Mountains;

Honshu, Shikoku. Korea.

f. violaceum Makino. Petals rarely pale purple or rosepurple.