We Could Make a Purple Daisy
In our daisy patch we find one white daisy, unlike the rest, with deep purple edges on the ends of its petals. If we were in search of a purple daisy we might try the seed of this, and from the variations resulting produce, at last, a daisy which was all of the purple color shown here.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 5