Aesculus hippocastanum
Red buckeye has hybridized with common horse-chestnut ("Aesculus hippocastanum") in cultivation, the hybrid being named "Aesculus × carnea", red horse-chestnut. The hybrid is a medium-sized tree to tall, intermediate between the parent species in most respects, but inheriting the red flower color from "A. pavia". It is a popular tree in large gardens and parks, most commonly the selected cultivar 'Briotii'. Hybrids of red buckeye with yellow buckeye ("A. flava") have also been found, and named "Aesculus × hybrida".