ATP database and Wiki both indicate dipladenia is a synonym for Mandevilla. The one I have has very shiny leaves, but it transplanted easily and is a non-stop blooming machine once it starts. I wish mine didn't ever try to twine, though. I have to stay on top of it or it will climb up the hanger. I occasionally take baskets down and submerge them, so it can't be allowed to do that. It really has been an easy plant to keep looking good.
