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A Row of Paradox Walnuts
The paradox walnut, it will be recalled, is a hybrid produced by Mr. Burbank, through cross pollenizing the Persian walnut and the California black walnut. The picture shows a row of very young Paradox walnuts growing beside Mr. Burbank's gardens at Santa Rosa.

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 7