CRYPTOGAMIA FILICES. PolypodiutO. ^^ 



On the trunks of trees: Virginia? 1/ . July. +• 

 Willdenow doubts whether this is really a native ot 

 Virginia, and I believe with much propriety, as I like- 

 wise never have seen any other species than P. vulgare 

 under the name of P. virginicum. 



3. P. frondibus profunde pinnatifidis, laciniis alternis linea- incanum. 



ribus integerrimis obtusis, superioribus sensim mino- 

 ribus, subtus stipiteque squamulosis, apice fructiferis, 

 soris solitariis. iVilld. sp. pi. 5. p. 174. 



P. ceteraccinum. Mich.Ji. umer. 2. p. 27 1. 



Acrostichum polypodioides. Sp.pl. 1525. 



Icon. Schkuhrjilic. t.W.b. 



On rocks and trunks of old trees : Virginia to Florida, 

 Kentucky and Tennassee ; on the rocks of the Natu- 

 ral bridge, Virginia, and on the stems of trees in the 

 Dismal-swamp. Ph. July. v. v. 



4. P. frondibus bipinnatifidis glabviusculis, pinnis duabus hexagonopte» 



infimis deflexis, laciniis lanceolatis obtusis ciliatis, pin- rum. 

 narum inferiorum inciso-crenatissuperiorum integerri- 

 mis, infimis adnato-decurrentibus, soris minutis soli- 

 tariis. IFilld. sp. pi. 5. p. 200. 



Icon. PluL aim. t. 2S4. /. 2. bona. Schkuhr filic. 

 t. 20. I. 



In shady moist woods on fertile soil : New York to Ca- 

 rolina. 11 . July. V. V. The whole leaf forms a 

 triangle in its circumference ; the stem is smooth. 



5. P. frondibus bipinnatifidis ciliatis, pinnis oppositis con- coiwectile. 



tiguis adnatis, pinnulis subellipticis, stipite paleaceo, 

 soris minutis. If Hid. sp. pi. 5. p. 200. 

 In shady woods : Canada to New York. 1/ . July. v. v. 

 Resembles the preceding. 



6. P. frondibus ternatis bipinnatis rectis rigidulis, laciniis calcareum. 



obtusiusculis subintegerrimis, soris marginalibus con- 



fluentibus. IVilld. sp. pi. 5. p. 2iO. 

 P. Drjopteris. Bolton JiUc. 53. t. 1. 

 Nephrodium Dryopteris. Mich.Jl. amer. 2. p. 27O. 

 In shady beech- woods : Canada to Pensylvania. 1/. 



July. V. V. This is a very rare fern in Pensylvania. 



I only found it on the western mountains in deep 



shady beech forests. 



