LUTHER BURBANK 



The plants selected for preservation may be 

 trained on posts or trellises, and made to take any 

 desired shape by nipping off the tips of stalk or 

 branches. The old wood should be cut away from 

 time to time. The best plants may be propagated 

 by tips or by suckers. 



REMAKKABLE HYBKIDS 



The blackberry and raspberry represent two 

 obviously related and familiar types of fruit, each 

 of which has characteristic qualities. But there 

 are many species of each group, and these may 

 be interbred indiscriminately, offering the most 

 inviting opportunities for the creation of new 

 varieties. 



When Mr. Burbank fertilized the dewberry with 

 pollen from the apple, the pear, the mountain ash, 

 and the rose, he was carrying hybridization to 

 something like its limits. The plants belong to 

 the same family, but the dewberry is not of the 

 same genus with any of the others. 



The fruit that formed was not visibly different 

 from other dewberries. But strange potentiali- 

 ties were blended in the seeds. 



The plants that grew from those seeds next 

 season showed the most extraordinary range and 

 variation of vine and leaf and flower. A few of 

 them formed berries, but in all cases these berries 

 were without seeds, or the seeds lacked the germi- 

 nating kernel. In other words, the strange hy- 

 brids were infertile. It would appear that the 



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