A REMARKABLE DAISY 327 



It is a general observation that shade-loving 

 plants, like those that open their flowers in the 

 twilight or at night, tend to produce white 

 flowers or at most those dressed in light and pale 

 colors; whereas the blues and oranges and reds 

 are worn principally by flowers that grow in the 

 open and put forth their advertisement for 

 insects in the sunlight. 



So we may reasonably suppose that the white 

 African daisy owes its present color to the influ- 

 ence of natural selection, and that it had among 

 its ancestors plants that bore colored flowers. 

 In any event, the orange African daisy has 

 colors of its own, without invoking the aid of 

 ancestors, and their orange color shows that 

 there are elements of red mixed with the 

 yellow. These elements, sorted out through 

 hybridization, sufficiently account for the pink 

 progeny. 



But among the hybrids of the yellow and white 

 African daisies, in addition to the pink ones, are 

 numbers that are yellow; and, in about equal 

 proportion, others that are white. These white 

 individuals closely resemble their white parent; 

 yet, as one of their parents was the orange daisy, 

 it is obvious that they have in their germ plasm 

 factors for yellow pigment, even though these 

 are not revealed. 



