REPORT OF THE STATE BOTANIST, I919 69 



Gregoria montana (A. Gray) comb. nov. 



Douglasia montana A. Gray, Proc. Am. Acad., 7:371. 1868. 

 Gregoria laevigata (A. Gray) comb. nov. 



Douglasia laevigta A. Gray, Proc. Am. Acad., 7 :37i. 1868; 16:105. 

 1881. 

 Gregoria arctica (Hook.) comb. nov. 



Douglasia arctica Hook. Fl. Bor. Am., 2 :i40. 1840. 

 Gregoria dentata (S. Wats.) comb. nov. 



Douglasia dentata S. Wats., Proc. Am. Acad., 17:374. 1882. 

 Gregoria johnstoni (A. Nels.) comb. nov. 



Douglasia johnstoni A. Nels. 



THELYPTERIS (Ruppius) Schmidel, Icon. PI. Ed. 2, 45. 



pis. 10 & /J. 1762. 



Doctor Nieuwland (Am. Mid. Nat., i : 226. 1910) has pointed out 

 the fact that the earliest valid name for our shield ferns, hereto- 

 fore known as Dryopteris, or Aspidium, is Thelypteris. In addition 

 to the species mentioned by him, the following New York species 

 should be transferred to this name. 



Thelypteris thelypteris (L.) comb. nov. Acrostichum the- 

 lypteris L., Aspidium thelypteris Sw., Dryop- 

 teris t he 1 y p t e r i s A. Gray ; T h e 1 y pt e r i s palustris 

 Schrott. 

 Thelypteris clintoniana (D. C. Eaton) comb. nov. Aspidium 

 cristatum var. c 1 i n t o n i a n u m D. C. Eaton ; Dryop- 

 teris clintoniana Dowell. 

 Thelypteris dilatata (Hoffm.) comb. nov. Polypodium dlla- 



tatum Hoffm.; Dryopteris dilatata A. Gray. 

 Thelypteris dilatata var. americana (Fischer) comb. nov. Dry- 

 opteris dilatata var. americana Benedict. 

 Thelypteris intermedia (Muhl.) comb. nov. Polypodium in- 

 termedium Muhl. ; Dryopteris intermedia A. Gray. 



