The Lawton Blackberry
A fine flavored, well fixed race of blackberries is the Lawton, shown above. If the pollen of the wild white berry had been applied to the pistil of the Lawton berry little variation could have been expected, the latter being so prepotent. But, by applying pollen from the Lawton berry to the flower of the so-called "Crystal White." Mr. Burbank produced variations which retained the lightness of color of the wild parent and combined the size, flavor and other good qualities of the well fixed Lawton.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 2 Chapter 2