The "Hemet" Cactus
Contrast these round, flat, robust slabs with the relatively slender ones shown in the preceding picture. It is obvious that these will produce a far greater yield per acre. Note that the small new slabs are dimpled where the embryo leaves have been. They will be as smooth as their parent slab in due course.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 8 Chapter 7