IS NATURAL GROUPS. 



The follo'wing species have been enumerated as British by several 

 authors; but as no certain native locality is known, there does 

 not seem to be sufficient authority for retaining them in our series. 

 Their names are therefore placed within brackets [ ] as uncertain, 

 and as plants which it is not desirable to regard as British without 

 further evidence. 



S. duiium (stolmiflwam). 

 H. auricula. 



m 



H. oreades. 

 H. saxifragum. 

 H. phimheum. 

 H. dovreme. 

 H. virescena. 



