The Burbank and Its Parent
At the left two typical Burbank potatoes; at the right two typical Early Rose specimens. As already noted, the Early Rose bore the seed ball from which the Burbank was developed. The difference between parent and daughter is explained by the fact that the parent is itself crossbred. The Burbank combines the qualities of some remoter ancestors.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 7 Chapter 9