308 



POLYPODIACE.E. 



forms Avhicli may bo easily regarded as distinct species. 

 Although I have not yet seen the specimens of the 

 named species, I suspect if P. append I culata may not be 

 a collective name for at least two different valid species. 

 Our ferns, which might be regarded as forms of the 

 same species, are very constant and are never variable. 

 Polypocliwm LINN. 



Polypodium aspidistrifrons HAY AT A sp. n<>\. 



Fig. 123-A; Polypodium aspidistrifrons HAYATA x }. 



Fig. 123-B, Polypo- 

 dium aspidistrifrons HA- 

 YATA; a, a portion of a 

 frond, natural size ; I>, a 

 scale on the rhizome ; c, 

 a scale on the surface of 

 the frond, greatly mag- 

 nified. 



