Ohwi 1985 Flora of Japan

Tree, with the young buds loosely yellowish brown pubescent, soon glabrous; leaves chartaceous, suborbicular, 4-7 cm. wide, cordate-truncate or subcordate at base, glabrous, palmately 5- to 7-lobed often to the middle, the lobes lanceolate to broadly so, acuminate, rather prominently duplicate-serrate, the petioles glabrous, slender, 3-5 cm. long, reddish; inflorescence a glabrous, pendulous, more than ]0-flowered compound corymb, the slender peduncles 3-4 cm. long; flowers dark red, 4-6 mm. across; sepals oblanceolate, about 3 mm. long, loosely brown-pubescent at apex; ovary glabrous or with few rusty brown soft hairs; samaras glabrous, ascending or spreading, the wing about 1.5 cm. long.

Apr.-May.

Woods and thickets in lowlands and mountains; Honshu, Shikoku, Kyushu;

very common and variable, with numerous cultivars grown in gardens. Korea.