Horsechestnut Buckeyes and horsechestnuts are deciduous trees with large winter buds having several pairs of outer scales. Leaves are opposite, long-petioled, and palmately compound with five to nine toothed leaflets. Flowers are borne in upright, many-flowered panicles and are showy.
Fruit is a large, fleshy nut.
I. Winter buds are sticky and resinous. Buds are larger and more sticky than others in the genus. The blooms are borne in May or June. Fruits are prickly and mature in September. Winter buds are not sticky or resinous.