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A Comparison of Walnut Leaves

At the left, a specimen of the Franquette variety of Persian Walnut; at the right a specimen of the black walnut. By hybridizing the Persian and the black walnuts, Mr. Burbank produced his remarkable Paradox Walnut.

A Comparison of Walnut Leaves

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 1