CATALOGUE. 



PTERIDOPHYTES. THE FERNS AND THEIR 

 ALLIES. 



OPHIOGLOSSACE^. The Adder-Tongue Family. 



Botrychium matricarifolium, A., Br., Matricary Grape- 

 fern. 



Two specimens doubtfully referred to this species 

 were collected near Custer, in the Black Hills, by Dr. 

 Rydburg. 



Botrychium virgiiiiaimm, (L,.) Sw. Virginian Grape- 

 fern. 



In wooded ravines in the Minnesota region and in the 

 Black Hills; rare. 



POLYPODIACE^. The True Ferns. 



Oiioclea seiisibilis, L., Sensitive fern. 



Near Rapid City, in the Black Hills. 



Oiioclea struthiopteris, (L.) Hoffm. Ostrich-fern. 



Along shaded streams in the Minnesota Valley and 

 the Black Hills. 



Woodsia scopuliiia, D. C. Eaton. Rocky Mountain 

 Woodsia. 



On wooded hillsides in the Black Hills; rare. 



Woodsia Oregon, D. C. Eaton. Oregon Woodsia. 

 Common throughout the Black Hills. 



Cystopteris fragilis, (L.) Bernh. Brittle- fern. 



On damp shady banks bordering streams and lakes 

 throughout the state. 



Pheg-opteris dryopteris, (L.) Fee. Oak-fern. 

 In deep woods in the Black Hills. 



