38 



Thus all three colors under certain conditions become 

 white. The common white variety is derived from the 

 blue, and with a lens, frequently remnants of the blue may 

 still be detected. It will be observed that these colors do 

 not retrograde in the same order as they advance. 



While many exau)ples of a sequence similar to above are 

 to be met with, there are certain yellows that change di- 

 rectl}^ to blue, no white or red intervening, though usually 

 some white, as in Pansy. The yellow anthei's and pollen 

 of crimson Tulips with a yellow centre become blue ; and 

 these yellow centres themselves change through green to a 

 dingy blue, which in the variety T. Gesneriana is a perma- 

 nent pure blue which sometimes appears as a blue star on a 

 round yellow eye I 



On certain yellow Pansies, not the lightest yellow, but 

 those more of a Cadmium yellow, is frequently to be seen a 

 dingy or olive green blotch which finally disappears, leaving 

 the flower of a clear color. If one will examine the half or 

 even two-thirds developed bud of the same plant, he will 

 find that its color is then partly or wholly violet, and that 

 the commingling of this with the developing yellow^ occa- 

 sions the greenish blotch. Sometimes a flower may be 

 found entirely and evenly colored a greenish yellow from 

 the same cause. Furthermore, if one picks open the bud 

 of a purple-brown or reddish-brown and yellow variety, 

 which is not a rare combination, he will find it also to be 

 purple. These brown varieties fade finally to yellow. Any- 

 one therefore can satisfy himself of the fact that violet or 

 blue purple precedes yellow in Pansies by analyzing the 

 colors, selecting of course suitable varieties. The writer 

 has often found a bud pure violet and an expanded flower 

 of the same plant pure yellow ! 



The yellow Pansy as it exists today was undoubtedly 

 once of a purple or violet color, as is clearly shown l)y the 

 darker face markings almost invariably to be seen and by 

 the violet spur. 



