130 THE EVOLUTION OF LIVING BEINGS. 



organs at the lower lip, while the one which appeared 

 in F 2 was light pink, and showed beautiful petaloid 

 sepals of the same color but in a lighter shade. 



The second photograph shows one flower of a plant 

 of the 2d generation, indicated by F 2 , which was flesh- 

 colored and resembled the flower of a Rhinanthus, the 

 other flowers, all belonging to the 4th generation (F 4 ), 

 were magenta and showed shapes very different indeed 

 also, from the parent-species crossed. 



