120 LUTHER BURBANK 



adapted to such a variety of climates that like 

 the Burbank plum they may be grown practi- 

 cally throughout all the plum-growing regions 

 of the world. 



And the explanation of this diversity is found 

 in the wide range of ancestral strains that have 

 been blended to produce this versatile company. 



Europe, Asia, and America have furnished the 

 foundation materials upon which have been built 

 the seventy or more varieties of plums, prunes, 

 and plumcots that have already been sent out 

 from my experiment grounds since the first im- 

 portation of Japan plums in 1885. 



The Asiatic plums have been the most used, 

 forty-three of the varieties introduced being de- 

 veloped from them. 



Fourteen introductions were developed in part 

 from American, and twelve in part from Euro- 

 pean species. 



NATIVE RAW MATERIALS 



The influence of foreign blood in our plum 

 family has often been mentioned. Let us now 

 give recognition to the contributions of the native 

 stock. 



The native plums of America, although 

 usually of a good flavor, are not nearly as large 

 as the Asiatic species, and not as large as the 



