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The California Poppy Turned White
The next experiment which Mr. Burbank tried was to eliminate the yellow of the wild poppy and produce, instead, a white flower. The tips of the petals of this poppy are now pure white, while the centers remain a very light cream-yellow, the only suggestion of the bright golden yellow of its ancestors.

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 9