LUTHER BURBANK 



tary factors of blue pigmentation; and obviously 

 it is not to be supposed that our experiment in 

 selection resulted in the creation of new hereditary 

 factors. 



But the time at which any ancestor of the pop- 

 pies bore blue flowers must have been very remote 

 indeed, because no poppy either of the species 

 directly in question or any other species has ever 

 been found anywhere in the world that has a 

 flower of blue color. 



So, as just suggested, the bringing out of this 

 color constitutes a development of radically dif- 

 ferent character from the mere modification of 

 color of a flower within the range of the color 

 scheme of a species, or of allied species, or even 

 of allied genera. 



The development of a Shirley poppy that is 

 yellow, for example, which was a second task that 

 a German experimenter set himself, would be com- 

 paratively easy, because yellow is a more common 

 color with members of the poppy family, and a 

 tinge of yellow is not unusual. 



I have myself developed and introduced strains 

 of Shirley poppies of salmon or deep yellowish 

 pink color. These include various shades of 

 salmon and light scarlet, but with no trace of 

 crimson or of darker colors of any kind. 



This flower, which had been selected also for 



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