Aesculus glabra or Ohio buckeye is a type of tree. It is a medium-sized deciduous tree that grows to be 15 metres (49 ft) to 25 metres (82 ft) tall. It lives in several states in eastern North America: Pennsylvania, Ohio, Nebraska, Texas, and Georgia. It also grows in the far southwest of Ontario.
The leaves have 5 or 7 leaflets, 8 centimetres (3 in) to 16 centimetres (6 in) big. The tree grows yellow flowers in spring. The fruit is a small shell. The shell has 1-3 nuts inside of it. These nuts are called buckeyes. The buckeye got its name when Native Americans thought it looked like the eye of a buck (a male deer). Buckeyes have acid in them, and they cannot be eaten by humans.