american plum

American Plum Prunus americana
Family: Rosaceae (Rose)
Branching: Alternate

This small tree is similar to Canada Plum, but more southern and not as common in Ontario. In the summer the leaves have sharper teeth and are less likely to have glands on the leaf stalks. Like Canada Plum, it is often a bit thorny, which helps to separate it from the Cherries, which have similar buds (especially Choke). Apparently, American Plum buds are more reddish than Canada Plum, but I have personally not seen enough to make any claim to that.