Aesculus flava, also known commonly as the common buckeye, the sweet buckeye, and the yellow buckeye, is a species of deciduous tree in the subfamily Hippocastanoideae of the family Sapindaceae. The species is native to the Ohio Valley and Appalachian Mountains of the Eastern United States. It grows in mesophytic forests or floodplains, generally in acidic to circumneutral soil, reaching a height of 20 to 48 m (66 to 157 ft).

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