of 



@Cimaftc cm6 ^eofogicaC granges 

 upon t$e ^rifisl? gffora, 



WITH REMARKS UPON THREE NEW DORSET PLANTS, ERICA 



LUSITANICA, SPARTINA TOWNSENDI, AND SETARIA 



VERTICILLATA. 



By J. C. MANSEL-PLEYDELL, D.L., F.L.S., F.G.S. 



(Read Feb. 26th, 1900. ) 



European Flora has been thoroughly and 

 systematically examined by the most eminent 

 botanists of the last century. It is generally 

 admitted that the majority of the European 

 plants have either migrated or originated 

 since the commencement of the Pliocene 

 Age, and that the original homes of the 

 immigrants must be looked for in Asia or 

 Arctic America. The late Mr. H. C. Watson 

 was the first of our British botanists who attempted to separate 

 the British Islands into provinces, by a line traced from the 

 south coast of England northwards to the Highlands of Scotland, 

 making the line correspond with the borders of the counties, 

 dividing those whose rivers flow into the eastern sea fijom those 



