The Pteridophytes of Wyoming 

 C. L. Porter 



The first report on the Pteridophytes of Wyoming was pub- 

 lished by Elias Nelson in the Fern Bulletin, Vol. VII, April 1899. 

 That report listed nineteen different plants for the state as hav- 

 ing actually been collected, as follows: 



Asplenium viride Huds. 

 Athyrium filix-foemina (L.) Roth. 

 Cheilanthes Feei Moore (Listed as C. gracilis) 

 Cryptogramma acrostichoid.es A. Br. 

 Cystopteris fragilis (L.) Bernh. 

 Notholaena Fendleri Kunze. 

 Notholaena sinuata Kaulf. 



Pellaea occidentalis (E. Xels.) Rydb. (Listed as P. atropurpurea var. occi- 

 dentalism 



Polystichum lonchitis (L.) Roth. (Listed as Dryopteris lonchitis) 



Pteridium aquilinum (L.) Kuh. (Listed as Pteris aquilina) 



Woodsia oregana Eaton 



Woodsia scopulina Eaton 



Eqttisetum arvense L. 



Equisetum arvense var. alpestre Wahl. 



Equisetum hiemale L. 



Equisetum laevigatum A. Br. 



Equisetum robustum A. Br. 



Equisetum variegatum Schleich. 



Selaginella densa Rydb. (Listed as 5. rupestris) 



The second, and last, report was published by Leo. A. 

 Hanna in the Fern Bulletin, Vol. XXII, pp. 1-11, 1932. This 

 report dealt only with the fern flora, and listed seven additional 

 species as follows : 



Asplenium septentrionale (L.) Hoffm. 

 Asplenium Trichomanes L. 

 Athyrium americanum (Butters) Maxon 

 Dryopteris Filix-mas (L.) Schott. 

 Pellaea Breweri Eaton 

 Pellaea densa (Brack.) Hook. 

 Polypodium hesperium Maxon 



The following is a complete list of pteridophytes for the 

 state according to our present knowledge of the flora. It includes 

 eleven additional species of which five are ferns, these new rec- 

 ords for the state being marked #. 



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