Prunus eminens

About

Prunus × eminens or Prunus eminens is a species of small cherry tree native to central Europe. It is a naturally occurring hybrid of sour cherry, Prunus cerasus, and dwarf cherry, Prunus fruticosa, occasionally found where their ranges overlap. Like its parents, it is a tetraploid with 32 chromosomes. It is forming a hybrid swarm with, and threatening to extirpate, P. fruticosa in much of its western range through genetic pollution.

Summary from Wikipedia