44. 



lichene occur in weak light as v/ell as in strong 

 light. Apparently the light factor is not the most 

 important one, though it undoubtedly exerts some 

 influence on the evaporating power of the air and 

 in that way affects tie distribution of the 

 epiphytes indirectly. The curve of the air temperature 



Pig. 15" Graph shov/ing the influence of LIGHT on 

 the distribution of the epiphytes, 



(Fig, 16) corresponds somewhat with the arrftngemoit 



of the epiphytes into regions, as was found in the 



evaporati»s curve, but this correspondence is not as 



definite as in the case of the evaporation! curve. 



In the case of the air temperature it is also evident 

 •flaat its influence on the occurrence of the epiphyte 



