Some Results of 1914 Wheat Experiments
This is a sample cluster of varying heads of wheat collected in Mr. Burbank's experiment garden in the summer of 1914. A glance at the picture shows the extraordinary range of variation among these crossbred wheats; and suggests the possibilities of development of any number of new varieties.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 8 Chapter 2