We bought our property last August, and the previous owners told me that this was a wild plum, and also that it never set fruit. Well, this year it set fruit, for sure! It flowered early, before any leaves appeared (I don't unfortunately have a pic of that), pale pink blossoms all up and down the branches. The fruit looks more like a cherry to me, and is a bit tart but very tasty. It would
be nice to know that it's not going to slowly kill me, however...