A Burbank Giant Gladiolus
This is a variety selected for size of the individual flower, rather than for arrangement of flowers on the stock. It illustrates the accentuation of size to about its limit, apparently, in the case of the gladiolus. Like all of Mr. Burbank's improved gladioli, this one is a very complicated hybrid.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 9 Chapter 6