470 THE SURVIVAL OF THE UNLIKE. [XXIX. 



Petunia violacea var. oculata. I imagine that even 

 Lindley did not have the pure species when he de- 



Comell Petunia. Hybrid. 



scribed P. violacea in 1833, for he says that it differs 

 from P. nyctaginiflora "in nothing whatever except 



