Some Stems of the Blackberry's Cousins
The direct color photograph print shows some typical rose stems-varying in color, shape and thorniness. The rose, and the blackberry, and the apple, and sixty-two other plants, dissimilar in appearance, are all members of the same family, and often give evidence of the possession of common family traits. In his work with the rose, described later, Mr. Burbank made use of similar methods to those employed in the production of the white blackberry.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 2 Chapter 2