''Aesculus'' × ''carnea'', or red horse-chestnut, is an artificial hybrid between ''A. pavia'' and ''A. hippocastanum'' . The origin of the tree is not known, but it probably first appeared in Germany before 1820. The hybrid is a medium-size tree to 20–25 m 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.