A LIST OF THE COMMON FERNS 257 



Camptosorus 

 Walking Fern, Camptosorus rhizophyllus. 



Asplenium 



Pinnatified Spleenwort, Asplenium pinnatifidum. 

 Scott's Spleenwort, Asplenium ebenoides. 

 Small spleenwort, Asplenium parvulum. 

 Ebony Spleenwort, Asplenium ebeneum. 

 Maidenhair Spleenwort, Asplenium Trichomanes. 

 Green Spleenwort, Asplenium viride. 

 Narrow-leaved Spleenwort, Asplenium angustifolium. 

 Wall Rue, Asplenium ruta-muraria. 

 Mountain Spleenwort, Asplenium montanum. 

 Rock spleenwort, Asplenium fontanum. 

 Bradley's Spleenwort, Asplenium Bradleyi. 

 Silvery Spleenwort, Asplenium acrostichoides. 

 Lady Fern, Asplenium Felix-foemina. 



Adiantum 



Maidenhair Fern, Adiantum pedatum. 



Venus-Hair Fern, Adiantum Capillus-veneris. (South and far 

 West.) 



Pteris 

 Bracken, Pteris aquilina. 



Pellaea 



Slender Cliff-Brake, Pellaea Stelleri. 

 Purple-stemmed Cliff-Brake, Pellaea atropurpurea. 

 Oregon Cliff-Brake, Pellaea dens a. 



Cheilanthes 

 Alabama Lip-Fern, Cheilanthes Alabamensis. 

 Hairy Lip-Fern, Cheilanthes lanosa. 

 Slender Lip-Fern, Cheilanthes gracilis. 

 Woolly Lip-Fern, Cheilanthes tomentosa. 



POLYPODIUM 



Common Polypody, Polypodium vulgare. 



Gray Polypody, Polypodium polypodioides (on trees in Gulf 

 states) . 



NOTHOLAENA 



Powdery Notholaena, Notholaena nivea dealbata (on calcareous 

 rocks in southwestern states). 



