Taxonomy
Prunus americana var. lanata Sudw is considered a synonym of Prunus mexicana, and Prunus americana var. nigra is considered a synonym of Prunus nigra.
Chickasaw plum (Prunus angustifolia Marsh.) hybridizes naturally with P. americana to produce P. × orthosepala Koehne.
In cultivation, many crosses have been made between American plum and other Prunus species.
Read more about this topic: Prunus Americana