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Some Blackberry Canes

It is possible, from the appearance of the cane of the blackberry, at certain stages, to predict the color of the fruit which is later to be borne. The application of this short-cut is fully explained under a later heading. The picture above shows a range of variation produced by crossing.

Some Blackberry Canes

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 7