A Burbank Plum and Its Wild Ancestor
When plants grow wild there is little need for large quantities of luscious meat; but as they come under cultivation the stone grows less and the meat not only more but better. This direct color photograph print is of one of Mr. Burbank's latest plums and of a wild plum such as grows in the woods near Santa Rosa; both are actual size.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 8