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Large Plum With Small Seed

This plum represents a stage of transformation. By hybridization and selective breeding a tendency to decrease in the size of the stone has been developed. But as yet the adjustment between stone and flesh of this particular race of plums has not been fully worked out-there is a cavity between the stone and the flesh. We shall see in other illustrations that the condition has been corrected in perfected varieties of plums.

Large Plum With Small Seed

This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 2 Chapter 4