Yet Another Shirley 



Once a flower manifests a tendency to varg, there seems 

 to be no limit to the range of its variations. It would be hard 

 to say Just what combination of hereditary factors in the germ plasm 

 of the original Shirley led to its peculiar departure from the tradi- 

 tions of its tribe. But man's selective judgment enabled these 

 submerged color factors to make themselves manifest, 

 as they doubtless would not have done without his 

 aid; with the result that a strikingly mod- 

 ified flower was produced in the 

 course of a few generations. 



