Cryptogamia filices. Aspidium. 
** Frondibus pinnatis. 
2. A. frondibus pinnatis, pinnis lanceolatis falcatis acutis acrOstiSioides, 
ciliato-serratis, basi superiore mucronato* auriculatis, 
inferiore cuneatis, superioribus fructificantibus mino- 
ribus, stipite rachique paleaceis, soris solitariis demum 
confluentibus. Willd. sp. pl. 5. p. 22 5. 
A. auriculatum. Schkuhr filic . 31. t. 30. exci, synon. 
Nephrodium acrostichoides. Mich.fi. amer. 2. p. 26/ . 
On rocks, in shady low places : New England to Caro- 
lina. 1/ . June — Aug. v. v. Resembles N. auricu- 
latum. 
*** Frondibus sub bipinnatis ; indusiis dimidiatis reni for- 
mil us. 
3. A. frondibus pinnatis, pinnis lineari-lanceolatis pinnati- 
fidis, laciniis oblongis obtusiusculis subintegerrimis 
ciliatis, soris marginalibus, stipite laevi. — Willd. sp. 
pl. 5. p. 248. 
A. thelypterioides. Swartz, sy nop. filic. 57 • 
Nephrodium thelypterioides. Mich. fl. amer. 2. p. 2 67. 
Polypodium noveboracense. Sp. pl. 1552. 
Icon. Schkuhr filic. t. 46. 
On river sides and the banks of ditches and ponds : Ca- 
nada to Carolina. I/. July. v.v. 
4. A. frondibus pinnatis, pinnis lineari-lanceolatis pinnatifi- 
dis glabris, laciniis ovatis acutis integerrimis, soris 
marginalibus contiguis demum confluentibus. Willd. 
sp. pl. 5. p. 249. 
Polypodium Thelypteris. Mant. 505. 
Poly stichum Thelypteris. Roth fl. germ. 3. p. 77 . 
Acrostichum Thelypteris. Sp.pl. 1528. 
Icon. Schkuhr filic. t. 52. Fl. dan. 76 0. Engl. lot. 
1018. 
Iu low grassy fields and swamps : Canada to Virginia/ 
1/ . July. v. v. It is very seldom found with fructi- 
fications j the leaves are smaller than in the pre- 
ceding. 
5. A. frondibus lanceolato-ovatis glabris pinnatis, pinnis 
subcordato- oblongis pinnatifidis, laciniis oblongis ob- 
tusis dentato-serratis, stipite paleaceo. — Willd. sp. 
pl. 5. p. 252. 
Polypodium cristatum. Sp.pl. 1551. 
Icon. Schkuhr filic. t, 3/ . Afzel. act. holm, 1787. t. 9, 
novelora- 
cense , 
Thelypteris . 
cristatum . 
