CLASSIFICATION OF FERNS. 



23 



Sub-Order, 



Polypodiaceae .. 



Tribe. 



Polypodiae 



Grammitidiae 



Osmundaceae .. 



Schizoeacese 



Marattiaceae 



Ophioglossaceae 



Genus. 



Polypodium 



Nothochlaena 

 Gyinnogramma 

 Osmunda ... 



Todea 



Schizcea 

 Lygodium ... 

 Marattia ... 

 Ophioglossum 

 Botrychium 



Sub-Genus. 

 ' Phegopteris 

 Goniopteris 

 Eupolypodium, in- 

 cluding 

 Grammitis and 

 Arthropteris 

 Niphobolus 

 Phymatodes, includ- 

 ing Dictymia 



Eutodea 

 Leptopteris 



Other writers on ferns divide the several Genera and Sub-genera somewhat 

 differently ; but I think it best to adhere to the classification of such high authorities 

 as the late Sir W. J. Hooker, and his successor Mr. J. G. Baker, even though it 

 involves such an apparent absurdity as separating Grammitis and Blechnum from the 

 tribes to which they give the names. As my readers will note, the sub-generic names 

 are dropped, and only the generic ones retained in naming the ferns. 



