Some Leaf Variations
Not only were the effects of the crosses evident in the berries, but in the leaves as well, as can be seen from the color photograph print above. In his almost endless selection from the variations produced, Mr. Burbank bore in mind not only the color and quality of the berries, but the size, shape and abundance of leaves, since, in the final result, these organs of digestion are to play an important part.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 2 Chapter 2