Japan Flora: Closely resembles M. bifolium, but usually slightly larger, deeper green and more lustrous, 10-25 cm. high, glabrous; leaves cordate, ovate to deltoid-cordate, 3-10 cm. long, 2.5- 8(-10) cm. wide, the marginal cells semirounded, the pedicels 3-7 mm. long; style rather stout. May-July. Coniferous woods; Hokkaido, Honshu, Shikoku, Kyushu; rather com-mon.
Kuriles, Sakhalin, e. Siberia, Manchuria, Korea, Kamchatka, and N. America.