American Plum (prunus americana)  Wild plum home to thickets and hedgerows in the eastern U.S. Possibly has the best smelling flowers in the entire world. Fruit is small, tough skin, and very delicious flesh. Highly disease resistant. Excellent pollinator for other plums and a solid rootstock for other plums and peaches.    Hardy in zones 3-8                                                                            (American plums are featured in the pictures here)

Beach Plum (Prunus Maritima)- Native plum to the coasts along the Northeast. Grows as a dense shrub to about 6 feet on average, drought and salt tolerant. In the wild, beach plum grows out of pure sand, stabilizing dunes. It also thrives in gardens. Produces small delicious plums ranging in color from blue to yellow.