Petridophyta. 



OPHIOGLOSSACE.^. 



OPHIOGLOSSUM VULGATUM Linn. 



BOTRYCHIUM TERNATUM (Thunb.) Sw. 

 BOTRVCHIUM TERNATUM AUSTRALE (R. Bt. ) Eaton. 



BOTRYCHIUM TERNATUM RUT^EFOLIUM Man. 

 BOTRYCHIUM TERNATUM OBLIQUUM (Muhl.) Milde. 

 BOTRYCHIUM TERNATUM DISSECTUM (Spreng.) Milde. 

 BOTRYCHIUM VIRGINIANUM (Linn.) Sw. 



FILICES. 



POLYPODIUM VULGARE Linn. 



POLYPODIUM VULGARE forma BISSERATA Millsp. Fl. W. Va. , 479 (1892). 

 "A form with regularly doubly-serrate thinnish fronds. On 

 mossy boulders along the Blackwater fork of Cheat river." 

 POLYPODIUM POLYPODIOIDES (Linn.) Hitch. Polypodium incanum Sw. 

 CHEILANTHES LANOSA (Michx.) Watt. C. vestita (Spreng.) Sw. 

 CHEILANTHES GRACILIS (Fee.) Met. C. lanuginosa, Nutt. 

 PELL^A ATROPURPUREA (Linn.) Link. 

 PTERIS AQUILINA Linn. 

 ADIANTUM PEDATUM Linn. 



ASPLENIUM PINNATIFIDUM Nutt. 

 ASPLENIUM TRICHOMANES Linn. 



ASPLENIUM PLATYNEURON (Linn.) Oakes. 



ASPLENIUM MONTANUM Willd. 



ASPLENIUM ANGUSTIFOLIUM Michx. 



ASPLENIUM ACROSTICHIOIDES Sw. 



ASPLEXIUM FILIX-FOSMINA (Linn.) Bernh. 



CAMPTOSORUS RHIZOPHYLLUS (Linn.) Link. 



PHEGOPTERIS PHEGOPTERIS (Linn.) Underw. 



PHEGOPTERIS HEXAGONOPTERA (Michx.) Fee. 



PHEGOPTERIS DRYOPTERIS (Linn.) Fee. 



DRYOPTERIS THELYPTERIS (Linn.) A. Gray. Aspidium Thelypteris (L.) 



' Sw. 

 DRYOPTERIS NOVEBORACENSE (Linn.) A. Gray. Aspidium Noveboracense 



(L.) Sw. 



DRYOPTERIS FRAGRANS (Linn.) Schott. Aspidium fragrans (L.) Sw. 



190 



