OUE NATIVE FEENS. 



GENUS I. 



POLYPODIUM. LiNX-Eus. 



SoRi "without an indusium, their receptacles being medial 

 or terminal on the free veins. 



Veins simple or forked, from a central costa. Venules free. 



Fronds simple to bitripinnate ; the stipes articulated or 

 continuous with the rhizoma. 



Rhizoma creeping, brief, or caudiciform. 



Five British species. 



