CATALOGUE. 



PTERIDOPHYTES. — THE FERNS AND THEIR 



ALLIES. 



Ophioglossace^. — The Adder-Tongue Family. 



Botrycliiviiii matricarifoliuiii, A., Br., Matricary Grape- 

 fern. 



Two specimens doubtfully referred to this species 

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

 Rydburg. 



Botrychiuiu virgiuiauiiiii, (L.) Sw. Virginian Grape- 

 fern. 



In wooded ravines in the Minnesota region and in the 

 Black Hills; rare. 



PoLYPODiACE^. — The True Ferns. 



Onoclea seiisibilis, L., Sensitive fern. 



Near Rapid City, in the Black Hills. 



Onoclea struthiopteris, (L.) HojBfm. 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 Oreg-on, D. C. Eaton. Oregon Woodsia. 

 Common throughout the Black Hills. 



Cystopteris frag'ilis, (L.) Bernh. Brittle-fern. 



On damp shady banks bordering streams and lakes 

 throughout the state. 



Phegopteris dryopteris, (L) Fee. Oak-fern. 

 In deep woods in the Black Hills. 



