CRYPtOGAMIA FILICES. Polypoclium. 
Ori the trunks of trees: Virginia? 1/. Julyi . -f- 
Willdenow 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 squamulosis, apice fructiferis, 
soris solitariis. Willd. sp. pl. 5. p. 174. 
P. ceteraccinum. Mich.Ji. amer. 2. p. 27 1. 
Acrostichum polypodioides. Sp. pl. 1525. 
Icon. Schhuhr Jilic. 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 glabriusculis, pinnis duabus hexagcnopte^ 
infimis deflexis, laciniis lanceolatis obtusis ciliatis, pin- rum, 
narum inferiorum inciso-crenatis superiorum integerri - 
mis, infimis adnato-decurrentibus, soris minatis soli- 
tariis. Willd. sp. pl. 5. p. 200. 
Icon. Pluk. aim, t. 2S4. f. 2. bona. Schhuhr Jilic, 
t. 20. h. 
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. 
3. P. frondibus bipinnatifidis ciliatis, pinnis oppositis con- conneciile, 
tiguis adnatis, pinnulis subelliptids, stipite paieaceo, 
soris minutis. Willd. sp. pL 5. p. 200. 
In shady woods : Canada to New York. 1/ . July. v. v. 
Resembles the preceding. - 
§. P. frondibus ternatis bipinnatis rectis rigidulis, laciniis calcaremu, 
obtusiusculis subimegerrirais, soris marginalibus con- 
fluentibus. Willd. sp. pl. 5. p. 210. 
P. Dr) opteris. Bolton JUic. 53. t. 1. 
Nephrodium Dryopteris. Mich.jl. amer. 2, p. 270 . 
In shady beech-woods: Canada to Pensylvania. 11 . 
July. V. V. This is a very rare fern in Pensylvania. 
I only found it on the w'estern mountains in deep 
shady beech forests. 
659 
incanum. 
