HYBRID MASSACHUSETTS ELM OX CAL 



ROOTS 



Note the different quality of bark at the base of the tree, representing 

 the California stock, on which the twig brought from Massachusetts was 

 grafted. The tree is only fifteen years old, and its extraordinarily rapid 

 growth is ascribed by Mr. Burbank to the fact that the parent from 

 which the twig was cut was a natural hybrid. 



