
CRYPTOGAMIA, FILICES. 209 
A. thelypteroides, Swartz. 
Nephrodium thelypteroides, Mich. | 
Polypodium noveboracense, Sp. Pl. 1552. 
Icon. Schk. filic. t. 46. 
New York Shield-fern. 
On the Wissahickon and Schuylkill. Not common. Peren- 
nial. July. 
5. A. fronds bi-pinnate; pinnule linear-lanceo- asplencides. 
late, incised, and serrated; serratures 2 or 3- 
toothed, terminal, more acute; sori oblong, 
lunate.— Willd, 
Nephrodium asplenoides, Mich. 
Polypodium Pennsylvanica, Mubl. in Litt. 
Asplenium Athyrium, Sprengel, Anleitung, S. p. 
115. 
Icon. Schuk. filic. t. 78. 
Dark or Spleen-wort Shield-fern. 
In similar places with the preceding species. Not uncom- 
mon. Perennial. July : 
5. A. fronds bi-pinnate, oblong-lanceolate ; pin- puiferwm, 
nulz opposite, oblong, obtuse, serrated, lower 
ones pinnatifid; rachis bulbiferous; sori sub- 
rotund.— Willd. 
Polypodium bulbiferum, Sp. Pl. 1553. 
Nephrodium bulbiferum, Mich. 
Icon, Schk. filic. t. 57. 
Bulb-bearing Spleen-wort. 
Varies in size very much. In shady woods, particular] 
rocks. Rare. Perennial. July. 4 4) mee 
592. ONOCLEA. Willd. in Mag. Ges. naturf. fr. z. berol. 1809. 
p- 160, 
Capsules densely covering the back of the 
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