The origins of prunes

A prune is any of various plum cultivars, mostly Prunus domestica or European Plum, sold as fresh or dried fruit. The dried fruit is also referred to as a dried plum. In general, fresh prunes are freestone cultivars (the pit is easy to remove), whereas most other plums grown for fresh consumption are clingstone (the pit is more difficult to remove).
Well so says Wikipedia. I don’t fully trust Wiki however since my prunes come in a box.