29. 



host itself, while the air plant gets its salts from 

 the surface of the tree after they have served the 

 function within it." As to its origin in the United 

 States, he suggests that it entered North America 

 from Eurasia Ly way of Alaska and then spread southward 

 and eastward . Van Oye (22) concludes from his 

 experiments and observations on some epiphytic 

 algae, lichens and mosses in Java that the lichens <^^^ 

 favor low humidity and intense sunlight, This is 

 in accord with Plitt's (23) work on the distribution 

 of lichens in Jamaica.Van Oye also found that mosses 

 develop only in the s%^ , while the alga TrentepoMia. 

 sp, seems to favor strong light. 



