Large, Graceful, and Artistic Petunias
These Burbank petunias represent the result of some generations of careful selection, with an eye to the accentuation of all the traits that make the petunia attractive. There is no reason to suppose, however, that the limits of variation have been reached in the specimens here shown.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 10 Chapter 4