just the single genus Prunus, with an open list of species, all of which are given at List of Prunus species.

One treatment of the subgenera derives from the work of Alfred Rehder in 1940. Rehder hypothesized five subgenera: Amygdalus, Prunus, Cerasus, Padus, and Laurocerasus. To them C. Ingram added Lithocerasus. The six subgenera are described as follows:
* Subgenus Amygdalus, almonds and peaches: axillary buds in threes (vegetative bud central,