INTEODTTCTION. 



purposes we may group together the floras of Virginia,' Taylors- 

 ville (California),^ the Lettenkohle and Lunz floras of Austria, 

 the rich floras of Scania,' Franconia,^ and other European 

 regions,* as so many scattered samples of a luxuriant vegetation 

 characterised by its worldwide distribution and uniformity of 

 composition. 



• Fontaine (83). 



2 Ward (00). 



3 Nathorst (78-86), (782), (733). 

 « Schenk (67). 



5 Heer (76), Compter (74), Jaeger (27), Stur (85), Schenk (66), etc. 



