Dryopteris Felix-Mas, (L.) Schott. Male-fern. 



Among rocks in the Black Hills. 

 Aspleiiium trichomanes, L. Maiden-hair spleanwort. 



Crevices of rocks in the Black Hills. 



Asplenium Felix-foemina, (L.) Fee. Bernh. Lady- 

 fern. 



In the Black Hills. 



Aspleuium Septentrioiiale, (L.) HofFm. Northern 

 spleanwort. 



In crevices of rocks in the Black Hills. 



Adiaiitum Capillus-Veneris, L. Venus-hair fern. 



Along a warm stream, near iCascade, in the Black 

 Hills.* 



Pteris aquiliiia, L. Brake. 



Near Custer, in the Black Hills. 



Pellaea atropurpurea, (L.) Link. Purple-stemed Cliff- 

 brake. 



Common in crevices of rocks in the Black Hills. 



Pellaea Breweri, Eaton. Brewer's Cliff-Brake. 



In limestone crevices near Bull Spring, in the Black 

 Hills. 



Cheilaiithes gracilis, (Fee.) Mett. Slender Lip-fern. 

 On exposed rocks in the Black Hills. 



Poly podium vulgare, L. Common Polypody. 

 In crevices of rocks in the Black Hills. 



Poly podium vulgare rotundatum, Wilde. Rouud- 

 lobed Polypody. 



In crevices of rocks near Custer, in the Black Hills. 



MARSILEACE^E. Marsilea Family. 

 Marsilea vestita, Hook & Grev. Hairy Marsilea. 



Very abundant in swails and ditches from the James 

 river valley westward to the Black Hills. 



*Bcssey, C. K. Bot., Gaz., Vol. XXVI, No.3, 211. 



