Here are some slabs of a new variety of spineless cactus that Mr. Burbank wished to test by themselves, where they could be readily observed and given special attention. A space in this bed of rare bulbous plants, where some specimens that have been found wanting were weeded out, gave just the desired opportunity. Strange bedfellows, perhaps, but neither plant will interfere with the other.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 12 Chapter 2