Purple Leaved Plum with Fruit
This is the so-called oval crimson variety of purple-leaved plum. It is a fruit of very attractive appearance and of rather good quality; which is by no means usual with the fruit of the purple-leaved plum. As a rule these plums are prized for their ornamental foliage rather than for their fruit.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 5 Chapter 8