Japan Flora: Dioecious tree, the branches grayish, lenticel late, white-pilosul 이is when young; leaves orbicular, depressed-cordate, 7-15 cm. long, 8-16 cm. wide, 5-lobed, sometimes to the middle, glabrous on upper side, pilosulous beneath, truncate to shallowly cordate at base, the terminal lobe ovate, 5-angled, shallowly 3-fid on upper part, abruptly acuminate with an obtuse tip, with few obtuse coarse teeth, the outermost pair of lobes very short and small; inflorescence a loose few-flowered, sessile corymb, 2-5 cm. long, glabrate, the pedicels 1-2 cm. long, nearly erect; flowers 5-merous, pale green; sepals and petals similar, oblong, suberect, 5-6 mm. long; stamens 8; samaras appressed-pilosulous, erect or slightly ascending, 3-4 cm. long. Apr.-May. Mountains;

Honshu, Shikoku, Kyushu.