LUTHER BURBANK 



the Cecil Bruner will hybridize readily with the 

 Rambler. Then it is possible to cross the hybrids 

 with numerous other hybridized roses, some of 

 which would not cross, or cross very unwillingly, 

 with the Crimson Rambler itself. 



The parents for the new crosses being them- 

 selves hybrids of complicated ancestry, it is obvi- 

 ous that the pedigrees in a few generations become 

 so complicated that if one were to attempt to trace 

 them there would be little time left for any other 

 experiments. 



So, as I said, I have contented myself with 

 watching for results among the hybrid progeny of 

 my roses of multiple ancestry. 



There are a few of the new developments that 

 carry strains of almost every rose generally known 

 and cultivated up to within ten years ago, and 

 many species not under cultivation. 



Some Ancestors of the New Roses 



It would be superfluous to name all the species 

 that I have had under cultivation and have tested 

 as to their possible value as hybridizing agents. 



Even were I disposed to make such a record, 

 it would necessarily lack finality. For there are 

 perhaps few plants regarding which botanists are 

 more at variance, when it comes to the matter of 

 classifying and differentiating the species. 



It is recorded, for example, that some classi- 



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