Japan Flora: Stems elongate; leaves thin, long-petioled, broadly ovate to ovate-cordate, 7-15 cm. long, 4-12 cm. wide, usually with short coarse hairs, palmately lobed or rarely entire, long-acuminate; staminate inflorescence spicate, elongate, sometimes branched, the flowers few, in fascicles, short-pedicelled, the pistillate usually simple, pendul이is; capsules broadly obovate; seeds with a broad wing on one side. Aug.

Hokkaido, Honshu (n. and centr. distr.). Korea and China.