This princess encompasses all stereotypes of femininity: innocence and experience – to use polite terms. She turns a soft bridal white in early spring and a hot Carmen crimson (as in the Bizet opera) in the fall. The funny thing is that this Canadian plum is sterile. Ours only bears two or three bitter plums each year. I don’t know how it ever survived in the wild.

http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/princess-kay-plum/