TO POI.YPODIUM. 



Under the name Pleuriclium Fee places Polypodium crassifo- 

 lium and P. rupcstre. Chrysopteris is the Phlehodium of authors, 

 and the EupJilehodium of Kk)tzsch; Craspedaria is the Lopholepis 

 of Smith; and Campylonetron the Cyrtoplilehium of authors. 



Moore, in his "Genera and Species of Cuhivated Ferns," 

 divides them thus: — 



Polypodium Goniophlebium Phlehodium 



Meniscium Cyrtophlebium ' Drynaria 



Goniopteris 



The latter of which he subdivides into PhylUtidis, Phymatodes, 

 and Drynaria-vcrce. 



Link, in his "Filicum Species," divides them thus: — 



Craspedaria Chrysopteris Polypodium 



Marginaria Campyloneurum Goniopteris 



Pleopeltis Anaxetum 



In Craspedaria he includes as a section the genus NipJioholus. 

 Kaulfuss, in his "Enumeratio Filicum," does not separate the 

 different sections, adopting the plan of Kunze. 



Piesl, in his "Tantamen Pteridographiffi," arranges the Poly- 

 podiums in the following manner: — 



Polypodium Goniophlebium Pleopeltis 



Goniopteris Marginaria Dictyopterls 



Pleocnemia Campyloneurum Phymatodes 

 Amblia ~ . 



Of these he subdivides Polypodium into Ctenopteris and Phe- 

 gopteris; Marginai'ia into Pleurogonium and Marginaria; Phy- 

 matodes into Euplnjmatodes , Pleuridium, and Drynaria. 



Presl's Genus Pleocnemia is confined to the Polypodium 

 Leuceanum of Gaudich, and his Amhlia to the P. juglandifo- 

 lium of Humboldt ; whilst his Dictyopteris contains only the 

 P. attenuatum of Brown, the P. macrodon of Keinw, the P. 

 p)teroides of Presl, and the P. irregulare of Presl. 



POLYPODIUM. LiNN^us. 



The true Polypodium has its veins simple, forked, or pin- 

 nate, and free. The sporangia is terminal or lateral, in some 

 cases being above the frond, and in others immersed. 



