Teayees. — Comparison of the Floras of Nelson and Ganterhiinj. 179 



sesses species, genera, or families of plants giving it any distinctive features 

 not common to the other, each nevertheless possesses species attaining a more 

 full development in the one than in the other, each possesses distinct 

 species belonging to genera common to both, and in each we find species 

 belonging to natural orders not at all represented in the other. In each -we 

 find the native vegetation apparently well adapted to the surrounding 

 physical conditions, but in both we see symptoms which lead us to the sup- 

 position that the peculiar native vegetation will one day disappear and be 

 replaced by foreign plants, under precisely the same circumstances which 

 have led to such changes in the Canary and other islands long colonized by 

 Europeans. 



