23. 



and no mycorliiza was found in thelroots of the 

 "epiphyte ".Hoeveler (12) claims that plants may make 

 use of humus without the aid of mycorhiza.Beyer (l) 

 also failed to find mycorhiza in the "epiphytes" that 

 he studied, Stahl (28) studying several epiphytic ferns 

 including Polypodium vulgare confiimed Beyer's results^ 

 for he fotind no mycorhiza in any of the plants studied, 

 Staeger (27) likewise failed to confirm Loew's view 

 regarding the presence of mycorhiza in epiphytes. 

 Czapek (3) in his study of the physiology of epiphytic 

 orchids found no mycorhiza associated with the roots 

 of those plant S.Johnson (13), on the other hand, 

 in his study of Polypodium vulgare states (p.239): 

 "Many of these root hairs (of the polypody) had one 

 or more fungus hyphae running lengthwise through them. 

 These hyphae could often be seen enetering at the tip 

 of the root ha,irs."He has not determined , however, 

 whether these hyphae formed a mycorhizal association 

 or not. 



Beyer (l) found that the "epiphytes" "belonged to 

 groups of plants whose fruits or seeds are stone-like, 

 bur-like, or have ^flying, apparatus, or are very small 

 and light .He concludes that the wind and the tree- 

 inhabiting animals aid in the distribution of the 

 "epijihytesfiXSeisenheyner's observations (5) confirm 

 those of Beyer. In another paper Beyer (2) states: 

 "only those plants can live as epiphytes which can 



