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More Hybrid Walnuts

The nut of the Paradox walnut has the outward appearance of the Persian walnut, one of its parents. The shell retains, however, a good deal of the thickness of the black walnut, but this can doubtless be modified by selective breeding in later generations.

More Hybrid Walnuts

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 2