LOOSESTRIFE AND PIMPERNEL. 135 



In all these cases a philosophical biologist 

 can but come to one conclusion. Not only 

 does the strawberry not differ generically 

 from the potentillas, but it is merely a slightly 

 divergent form of this particular potentilla, 

 which is much more closely related to it than 

 to the other members of the artificial genus. 

 And so, too, not only does the pimpernel not 

 differ generically from the woodland loose- 

 strife, but it is merely a slightly divergent 

 form of that particular loosestrife which is 

 much more closely related to it than to the 

 other members of the genus Lysimachia. 



