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Variations in Seedling Almonds
Like the other cultivated orchard fruits, the almond does not breed true from the seed. If the crop is to be kept uniform, the orchard must be grafted. Interesting variations may result, however, from growing the seedlings, as this picture suggests. Here is material for the development of any number of varieties.

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 3