There are few native American Fruit trees .... not Apples, not Pears, or Peaches or Sweet Cheries, but the North American Plum is one and we here are at one of the fingers of it's northern extent.  Maybe the Cayuga had them in their orchards along with the Pears and Apples and Peaches and so on introduced to them by the early Jesuit missionaries, but here are a couple thriving here on ?Dog's Plot through no intervention of our own and, since one can graft cultivated Plum types onto it, we will be doing that.