Trees, Shrubs and Conifers: Purple plum tree or purple leaf sand cherry?, 1 by jeffinsgf

jeffinsgf wrote:
Here's a pic from my Prunus x cistena. I am confident in the classification, based on the reputation of the nursery where I bought it (they're huge, and old and extremely well respected in the industry).

I think identification by bloom is going to be extremely difficult. Almost every Prunus species that I have seen has a very similar blossom to this. As to your specific hybrid, did you keep the name tag from your purchase, and does the grower have a website?