K .''. bV'j: • : : '^.&/^^^^ ^ 



Portion of mature Frond— under side. 



rOLYPODIUM PtOBERTIANUM. 

 KuNZE. Hoffmann. Koch. Fries. Moore. 



PLATE XXVIII. 



Polypodiwm cahareum, 



Polypodiiim dryopteris, 

 Neplwodium dry op teris, 

 Lastrca calcarea, 

 Phegopteris calcarea, 

 Lastrea Rohertiana, 



J. Smitu. Line. "VVilldenow. 

 Presl. Nem^man. Sprengel. 

 SowEEBi. Francis. Deakin. Peatt. 



HOOKEP. AND ArNOTT. BaBINGTON. 



Bolton. Newman. Lederour. A. Gray. 



MicnAux. 



BoRY. Neavman. 



Fee. 



Newman. 



Gymnocarpium Rohertianim, Newman. 



Polypodium — Polypody. 



Robertianum — Named after a Botanist, 



The Polypodium Hohertianum is a very similar-looking- species 

 to the P. dryopteris, and was for some years merely looked 

 upon as a variety of the same Fern. This is a larger and more 

 robust Fern, and the frond is covered with a pubescence, that 

 gives it the appearance of being dusted over with lime. Bolton 

 was the first to point out the difference between P. Pohertianum 

 and P. dryopteris, and Hoffmann to pronounce it a distinct 

 species. Mr. Wilson and Mrs. Riley have both paid particular 

 attention to these Ferns, indeed the evidence of various botanists 

 have shewn conclusively that the two species are quite distinct. 



It is a native of England, Wales, Hungary, France, Germany, 



