A Pear-Shaped Cactus Fruit
The fruit of the cactus is commonly spoken of as a "cactus pear." The appropriateness of the term is suggested by this particular variety, the fruit of which is distinctly pear-shaped. This variety retains more of the primitive form of fruit than most other of Mr. Burbank's perfected fruiting Opuntias.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 6 Chapter 7