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Striking Contrasts in Plums

The picture shows a blue stoneless plum growing on the same tree the Barnblood plum-the result, of course, of a grafting experiment, in which the Barnblood tree was the stock. Such anomalies are common enough in Mr. Burbank's orchard, but are always interesting.

Striking Contrasts in Plums

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 5 Chapter 5