Cross Between Orange and Lemon
This very curious hybrid is likened to the crossbreed apple shown in the frontispiece of the present volume. It would appear that part of the stigmas of the flower were fertilized by pollen of the orange, the others by pollen of the lemon. That the fruit itself should take on a mongrel type, as here shown, is anomalous but not without precedent, as the case of the hybrid apple shows. Mr. Burbank's interesting experiments in hybridizing the lemon and the orange were interrupted by the loss of his trees through frost.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 4 Chapter 9