Tree of Ponderosa Lemons
This tiny tree bears lemons of a size seldom seen in the eastern markets. It is customary in the lemon-growing regions to pass the fruit through a ring of a certain size, to get standard size, only those that will pass through the ring being shipped. The big lemons are much better than the small ones, but as lemons are sold by the dozen in the eastern markets, it does not pay to ship those of exceptional size.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 4 Chapter 9