LUTHER BURBANK 



while the bush-like mountain form is very hardy. 



Being an unusually ornamental evergreen the 

 mountain variety should be extensively planted 

 in cold climates. 



I am inclined to believe that the golden ever- 

 green chestnut and the chestnut oak could be com- 

 bined by crossing. If so, remarkable trees could 

 be produced. 



As yet, however, I have not been able to attempt 

 this hybridization, nor, indeed, have I as yet 

 hybridized the golden chestnut with the ordinary 

 chestnut, for the reason above stated. 



I have made tentative efforts, however, to cross 

 my early bearing hybrid chestnuts with the Cali- 

 fornia tanbark or chestnut oak, Quercus densi- 

 florus. 



Notwithstanding the wide difference between 

 the species, numerous nuts were produced and it 

 seems probable that these were hybrids. As to 

 this, however, I cannot be certain until the seed- 

 lings have come to maturity. 



The object of such wider hybridizing is, in 

 particular, merely to test the possibilities of cross- 

 ing a plant that shows a high degree of inherent 

 flexibility. But it is also desirable for practical 

 reasons to accentuate the variability and to carry 

 forward further series of experiments in selective 

 breeding. 



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