Few types of experiment appeal more strongly to Mr. Burbank than those directed toward the bringing out of some obscure quality or submerged trait of a flower, such, for example, as an unfamiliar or unusual color. No one needs to be told that a blue rose is an anomaly. The color photograph shows Mr. Burbank's success in causing the rose to take on this unfamiliar color.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 9 Chapter 2