Giant Artichoke in Blossom
The artichoke belongs to the family of Composites, in which numerous blossoms are grouped together to form a head with a single floral envelope. The daisy and the sunflower furnish familiar examples of this arrangement. The artichoke for eating is plucked before the blossoms are mature. If allowed to reach the stage shown in this picture, it is inedible. Mr. Burbank has developed new varieties of artichoke, the heads of which are of gigantic size.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 3 Chapter 3