Japan Flora:  Small dioecious tree with white-puberulent branch lets; leaves orbicu-lar, thin-membranous, palmately 5(-7)-lobed, cordate at base, 5-10 cm. long and as wide, white-puberulent at first beneath, persistent on the nerves, the lobes broadly ovate, caudately acuminate, rather regularly double-toothed, the petioles 3-10 cm. long, slender; inflorescence a few-flowered raceme, 3-6 cm. long, thinly white-puberulent, the pedicels ascending, glabrous, about 3 mm. long; petals short; stamens about 4, longer than the sepals; samaras glabrous, nearly horizontally spreading, 2,2.5 cm. long.  May-June. Mountains;

Honshu (Kanto Distr. to s. Kinki Distr.), Shikoku.