CRYPTOGAM I A FILICES. Polypodium. 
On the trunks of trees: Virginia? 1/ . July. -f. 
VVilldenow doubts whether this is really a native of 
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 pinnalifidis, laciniis alternis linea- 
ribus integerrimis obtusis, superioribus sensim mino- 
ribus, subtus stipiteque squaraulosis, apice fructiferis, 
soris solitariis. IVilld. sp. pl. 5. p. 1 74. 
P. ceteraccinum. Mich.Jl. amer. 2. p. 27 1. 
Acrostichum polypodioides. Sp.pl. 1525. 
Icon. Schkuhr Jilic. t. 1 1 . 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 glabriusculis, pinnis duabus hexagonopte - 
infimis deflexis, laciniis lanceolatis obtusis ciliatis, pin- rum. 
narum inferiorum inciso-crenatis superiorum integerri- 
mis, infimis adnato-decurrentibus, soris minutis soli- 
tariis. IVilld. sp. pl. 5. p. 200. 
Icon. Pluk. aim. t. 284. f. 2. bona. Schkuhr Jilic. 
t. 20. h. 
In shady moist woods on fertile soil : New York to Ca- 
rolina. 1/ . July. v. v. The whole leaf forms a 
triangle in its circumference ; the stem is smooth, 
5. P. frondibus bipinnatifidis ciliatis, pinnis oppositis con- connectile. 
tiguis adnatis, pinnulis subellipticis, stipite paleaceo, 
soris minutis. IVilld. sp. pl. 5. p. 200. 
In shady woods : Canada to New York. % . July. v. v. 
Resembles the preceding. 
6. P. frondibus ternatis bipinnatis rectis rigidulis, laciniis calcareum. 
obtusiusculis subintegerrimis, soris marginalibus con- 
fluentibus. IVilld. sp. pl. 5. p. 2i0. 
P. 'Dry opteris. Bolton Jilic. 53. t. 1. 
Nephrodium Dryopteris. Mich.Jl. amer. 2. p. 270. 
In shady beech-w r oods : Canada to Pensylvania. If. . 
July. v. v. This is a very rare fern in Pensylvania. 
I only found it on the western mountains in deep 
shady beech forests. 
659 
incanum . 
