72 



INDEPENDENCE OR SEPABATION OF ORGANS. 



cleft, as it is constantly in Phlomw biloha^ or more 

 markedly among the Loheliacece. 



In the Compositce, a similar separation of the petals 

 is not infrequent, thus showing frequent transitional 

 stages between the labiatifloral and tubulifloral 

 divisions respectively. The ligulate corollas also may 

 often be found in Chrysanthemums, Dahlias, &c., 

 more or less deeply divided into their component 

 parts. 



A more complete separation occurs not unfrequently 

 in Campanula^ BhododendroUj Phlox, ^c. Figs. 30 and 

 31 illustrate dialysis of the corolla ; the first in Correa, 

 the second in Campanula. 



Fia. 31. Dialysis of the corolla in Campanula sp., after De Candolle. 



In the last-named genus, C. rotundifolia has been 

 found with polypetalous flowers in a wild state in 

 the mountains of Canton Neufchatel, Switzerland, and 

 gave rise to the creation of a new genus. This form 

 is now introduced into gardens. 



It must be remembered that in some genera, where 

 this separation of the petals has been met with, there 

 are species in which a similar isolation occurs normally, 

 as in Rhododendron. R. linearilobum, a Japanese 

 species, offers a good illustration of this. 



The following list contains the names of the genera 



