A Natural Hybrid
This natural hybrid raspberry was found growing wild by Mr. Burbank in Alberta, Canada. It was brought to Santa Rosa, and has been used in various hybridizing experiments. The chief interest of the plant, however, is that it is a natural hybrid that was growing in a state of nature, and apparently competing successfully with both of its parents.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 6 Chapter 2