31 



different manner of color development and change in 



the same compound flower. The yellow here is 



secondary to the red ! 

 CakUe Americana, commonly at first white and its fila- 

 ments green, both change to purple, and the green 



sepals with age become yellow. 

 Rhexia Virginica, rose-purple, the yellow filaments change 



to scarlet after expanding, also the lower half of the 



yellow anther. 

 Sisi/rinchiuiii auguMifolium, blue, the u[)per portion of 



the yellow filament changes to blue, while the lower 



part remains unchanged ! 

 Poly gala iwhjgama and P. cruciata have their true flowers 



pale yellow, changing through orange to rose-purple ! 

 Cohea scandens, pale green the flrst day, the inside of the 



lobes become pur[)lish on the second day, and by the 



third day the entire bell-shaped corolla has become a 



be-iutiful purple ! 

 Erigeron Canadensis, the outer rows of minute white 



flowers turn purple. 

 Lindelojia, Symphyluni, Anc/tusa, Om.2)holodea,Mertensia, 



Pidmonaria, etc., change from pink or red to blue. 

 Myosotis laxa, in bud white, becomes first pink, then 



light blue. The different species all have a yellow^ 



eye. 

 Gera.rdia uiaritima, petals purple expanded, are of a 



pale yellow in a half developed bud. Anthers and 



pollen snow-wdiite. 

 Lycopiis Virginicus, white ; in the bud or just before 



expanding is a pale yellow ; at least those growing 



in dry soil and sunny places ; also Alyssum mariii- 



mnni, white, under certain circumstances has been 



observed to be pale yellow in bud. 

 Aster vimineus, white, and several other white species 



change to pink, lilac or rose-purple. 

 Primula Sinensis, Chinese primrose, has varieties first 



