16. 



possible to establish the actual causes underlying 

 the influence of the climatic conditions and of 

 the character of the substratum on the distribution 

 of the epiphyte. Before presenting the data obtained 

 from the physiological, ecological and morphological 

 study of this epiphyte indigenous to the Southeastern 

 United States, it is perhaps well to give a brief 

 review of the literature on epi::hytes in geneia.1 

 so as to follow up the ideas on epiphytism as 

 conceived by the earlier botanists and particularly 

 to sho^how little is actually known about this 

 interesting group of plants. 



The writer wishes to express his thanks to 

 Professor C.C.Plitt for the determination of 

 several of the lichens and to Mr,RoS,Williams 

 of the New York Botanic Gardens for the 

 determination of some of the epiplitic mosses. 



