Aesculus glabra

Ohio buckeye is a member of the horse chestnut or Hippocastanaceae family and is native to the midwestern and lower Great Plains regions of the United States, and the extreme southwest of Ontario in Canada. It grows up to 30 m tall.

• Leaves are opposite, palmately compound with 5 leaflets, oval to obovate and 8-16 cm long, serrated margin. They are on long stocks.
• Flowers are yellow, 2—3 cm long, with stamens longer than the pistils; they are produced in panicles in the spring.
• Fruit is a round, spiny capsule 2—5 cm in diameter, on a stout stock, containing 1—2 brown seeds 2—3 cm in diameter, with a whitish circular basal scar.
• Twigs are stout, with large shield-shaped leaf scars; terminal buds are large, orange-brown with keeled scales. Lateral buds are much smaller. Foliage and fruit are toxic to cattle and humans.
• Bark is smooth, ashy gray when young, later becoming rough and darker gray.