Tree, usually with glabrous branches; leaves depressed-orbicular, 7-15cm wide,deeply to rather shallowly 5- to 7-lobed, cordate to somewhat truncate at base, usuallyglabrous on upper side, short-pubescent to glabrous except for the axillary tufts lfhairs beneath, the lobes deltoid to lanceolate, entire or with few coarse teeth,acuminate and awn-tipped, the petioles 4-12cm long, glabrous to short-pubescent;inflorescence on short peduncles, corymbose, 4-6cm across; flowers yellowish green,small, 5-7mm across; sepals oblong; petals broadly oblanceolate; samaras glabrous orshort-pubescent while young, nearly erect to ascending, 2-3cm long inclusive of thewing. (Korea)