FLORA OF VERMONT 



PTERIDOPHYTA. FERN PLANTS 



POLYPODIACEAE. FERN FAMILY 



ADIANTUM. Maidenhair 

 A. pedatuin L. Rich moist woods; common. 



ASPIDIUM. (DRYOPTERIS). Shield Fern 



X A. Boottii Tuckerm. (A. cristatum x spinulosum, var. Intermedium). 



Boott's Shield Fern. Wet thickets and about ponds; occasional. 

 A. cristatiiin (L.) Sw. Crested Shield Fern. Moist thickets and 



swamps; frequent. 

 A. cristatuin (L.) Sw., var. Clintoniainim D. C. Eaton. (D. Clintoniana 



[D. C. Eaton] Dowell). Clinton's Shield Fern. Swampy woods; 



frequent. 

 A. Filix-mas (L.) Sw. Male Fern. Hartland, (Nancy Darling) ; 



Woodstock and Bridgewater, (Mabel A. Strong) ; Barnard, (Miss 



F. E. Corne) ; Brandon, (Kirk and Button). Forma iucisnm Clute. 



Brandon, (Kirk and Button). 

 A. fragraus (L.) Sw. Fragrant Fern. Mt. Mansfield, Camel's Hump, 



and Bolton Notch, (Pringle) ; Mt. Zion, Hubbardton, (Ross and 



Eggleston). 

 A. Goldianuiii Hook. Goldie's Fern. Rich moist woods; occasional. 

 A. iiiargiiiale (L.) Sw. Marginal Shield Fern. Rocky woods; common. 



Var. elegaus J. Robinson. Swampy woods; occasional. 

 A. noveboraceuse (L.) Sw. New York Fern. Moist woods and swamps; 



common. 

 X A. pittsfordeuse (Slosson) Eastman. (A. marginale x spinulosum). 



Pittsford, (Margaret Slosson); Hartland, (Nancy Darling). 

 A. sinmlatnm Davenp. Massachusetts Fern. Rare. Brattleboro, (Mrs. 



F. B. Horton) ; Hartland, (Mrs. Hurd). 

 A. spinnlosnm (O. F. Miiller) Sw. Spinulose Shield Fern. Damp 



woods; occasional. 

 A. spiiinlosnm (O. F. Miiller) Sw., var. dilatatum (Hoffm.) Gray, forma 

 aiiadeiiium Robinson. (D. dilatata [Hoffm.] Gray). Broad Shield 



Fern. Mountain woods; common above 2,500 feet altitude. 

 A. spinulosum (O. F. Miiller) Sw., var. mtermedium (Muhl.) D. C. Eaton. 



(D. intermedia [Muhl.] Gray). Woodlands; common. 

 A. Tlielypteris (L.) Sw. Marsh Fern. Swamps and wet places; com- 

 mon. 



Additional Hybrid Forms 

 A. cristatum x cristatum, var. Cliutonianuui. In tracts where plants 



of the species and its variety are numerous intermediate forms are 



usually frequent. 



