330 LUTHER BURBAISTK 



in which neither yellow nor red pigment 

 is used, the flower being allowed to remain 

 white. 



We saw evidence that there are such latent 

 color factors in flowers in such a case as that of 

 the yellow poppy that when matched with a 

 white one produced a galaxy of crimson poppies. 

 The case of the orange African daisy mated 

 with a white one is a variant on the same 

 theme. 



And the illustration just cited of the different 

 cases in which flowers of the same species have 

 blossoms that may run the gamut of colors from 

 scarlet through yellow to blue, or may lack color 

 altogether, shows how common is the phenome- 

 non of the mixture of factors for different colors 

 in the same germ plasm. 



We shall perhaps not be far wrong if we 

 assume that every colored flower has underlying 

 potentialities of other colors than the one repre- 

 sented. And there is a good evidence to suggest 

 that yellow underlies red and is dominated by it 

 when there is a mixture of different factors ; that 

 blue, lying toward the other end of the prismatic 

 scale, stands rather by itself and in a way 

 opposed to the other colors; and that white, as 

 just suggested, may represent either the absence 

 of factors for pigmentation or the presence of 



