The Improved Burbank Artichoke
Contrast this mammoth blossom with the relatively insigniflcant blossom of the wild artichoke. The front of this wonderful flower is twenty inches across. It bears scant resemblance to the wild prototype; except, indeed, that the essential flower organs at its center have the same thistle-like appearance. So striking a modification has been brought about only through long cultivation; but the Burbank artichokes have made giant strides in a few generations.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 7 Chapter 6