Some Other Forms of Corn
In the direct color photograph print shown here the central ear and the ear at the right are "pod" corn, in which each kernel is encased in a separate sheath. The ear at the left is another form of teosinte with larger kernels than those in the preceding print; from this latter the process by which the kernels crowded each other until the cob increased in size may be readily imagined.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 4