The Snowball, Tame and Wild
The upper snowball is the one which grew in Mr. Burbank's yard, or such as commonly grows under cultivation. The snowball below is a wild one such as grows in the woods. The wild snowball, it will be seen, uses the flowers to attract messengers of pollenation to the reproductive mechanism which the flowers encircle. The upper snowball, however, has lost its power of reproduction by seed and advertises to us, instead, to perpetuate its race.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 4