Another Fine Specimen of the Royal Walnut
This magnificent tree, one of the first seedlings of the Royal walnut, stands in a dooryard beside the Sebastopol road, near Santa Rosa. It bears mute but eloquent testimony to the success of one of Mr. Burbank's early experiments in hybridizing forest trees.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 7