Some Potato Seedlings
A direct color photograph print of different kinds of potatoes produced from a single potato seed ball. It will be seen that while all of these potatoes are small, some are more shapely than others and at the bottom of the picture will be seen a common variation of tubers known as "snake potatoes." These forms represent different stages in the history of the potato and almost any potato seed ball will give variations as wide or wider than these.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 2