Odd Cousins of The Tomato
These curious products are potatoes of a strange tropical variety; representatives, probably, of a type of plant somewhat intermediate between the modern developed varieties of tomato and potato. The attempt to hybridize the potato and the tomato should be carried out persistently, for if hybridization could be effected, the results would be extraordinary; and Mr. Burbank's success in grafting the two plants suggests that the thing is not impossible.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 7 Chapter 4