BERRIES AND GARDEN FRUITS 



hereditary strains thus brought together were too 

 widely divergent for compromise. 



A somewhat similar result was obtained when 

 Mr. Burbank brought pollen from a strawberry 

 flower and placed it on the pistil of the flower of 

 a raspberry. The seeds of the raspberry were 

 carefully preserved, and next season they germi- 

 nated and produced plants which at first had all 

 the appearance of the strawberry plant, but which 

 subsequently sent up stalks not unlike those of 

 the raspberry. The leaves of the curious hybrid, 

 however, were always trifoliate, like the leaves of 

 the strawberry. 



The plants blossomed, but formed only abortive 

 berries that had no seeds. 



On the other hand, when Mr. Burbank fertilized 

 the flower of the dewberry with pollen of a rasp- 

 berry plant he had imported from Siberia, one 

 of the numerous hybrid offspring showed great 

 vigor, having a much larger leaf than either of 

 its parents, and producing a fruit that also was 

 much larger than that of either parent. This 

 fruit was named the Primus berry. It has the 

 outward appearance of a blackberry, but if al- 

 lowed to remain on the vines until entirely ripe, 

 it parts from the receptacle on being picked, just 

 as a raspberry does. 



The Primus berry is a hybrid of the first gen- 

 eration, which appears to blend the qualities of 

 its parents in about equal proportions. Curiously 

 enough it did not revert to the form of either 

 parent in the next generation, though thousands 



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