Portion of mature Frond — under side. 



POLYPODIUM PERCUSSUM. 



Cayanilles. Kunze. Swartz. Kaulfuss. Willdenow. 

 Raddi. Langsdorff and Fischer. Sprengel. 



PLATE XX. VOL. II. 



JPleopeltis perctissa, 



Polypodium cuspidatum, 



" avenium, 



PJilehodium percussum, 

 Drynaria perciissa. 



Peesl. Hookee and Greville. 



J. Smith. Link. 



Peesl. 



Desvaux. 



J. Smith. Mooee and Houlston. 



Pee. 



Vo ly podium — Polypody. 



JPercussum — Stricken. 



In the Section Pleopeltis of Authors. 



The Polypodium percussum is a dwarf creeping species, with 

 bold, large fractification, which gives the frond a noble ap- 

 pearance. It perhaps requires more than ordinary care to grow 

 this species successfully. As a general rule, the Ferns with 

 creeping sori require to be planted with the rhizomas above 



