Heralding from North America, where horse chestnuts are called buckeyes. Also known as Yellow Buckeye. Introduced 1764.

Native to east-central USA. An occasional specimen in public spaces and arboreta.

Monoecious, hermaphrodite flowers. Insect-pollinated. Gravity-dispersed.

Medium (30m), narrow-domed with sinuous branches. Bark grey, becoming rough and scaly. Twigs orange-brown, glabrous, with large triangular leaf scars; buds opposite, rounded, non-resinous, terminal bud often absent. Autumn foliage bright orange-red. Leaves compound palmate with 5-7 almost-sessile obovate-elliptic leaflets, dark green and glabrous above, variably hairy below, serrate. Flowers in modest yellow panicles with hairy petal tubes, May-June. Fruits subglobose (5-8cm), the husk pitted but not spiny.