208 
acrostichoi- 
des. 
marginale. 
intermedium. 
novebora- 
cense, 
CRYPTOGAMIA, FILICES. 
591, ASPIDIUM. Swartz, Synop. filic. 3. 
Neraropium, Mich. 
Sori roundish, scattered. Indusium umbili- 
cate or opening on one side.—Wutt. 
1. A. fronds pinnate; pinne lanceolate, falcate, 
acute, ciliate-serrated ; upper base mucronate- 
auriculated, lower fructificant and smaller; 
stipe and rachis paleaceous ; sore solitary, at 
length, confluent.— Willd. 
A, auriculatum, Schk. 
Nephrodium acrostichoides, Mich. 
Terminal Shield Fern. 
On the rocks in the vicinity of our, waters, common; also in 
woods. Perennial. June. 
2. A. fronds bi-pinnate; pinnule oblong, obtuse, 
decurrent, crenate, the folds deepest at the base ; 
sore marginal ; stipe paleaceous.— Willd. 
Polypodium marginale, Sp. Pl. 1522. 
Nephrodium marginale, Mich. 
Icon. Schk. filic. t. 45. b. 
Marginal Shield-fern. 
In shady woods, particularly on rocks. Perennial. July. 
5. A. fronds bi-pinnate ; pinnule linear, pinnati- 
fid-incised ; segments sub-mucronate, serrated 
at the apex; stipe paleaceous.— Willd. 
Large Shield-fern. 
A large and well-marked species. In the woods of Jersey, 
among other ferns—more rare west of the Delaware. Peren- 
nial. July. 
4, A. fronds pinnate; pinne linear-lanceolate, 
pinnatifid; segments oblong, somewhat obtuse, 
nearly entire, ciliated; sore marginal; stipe 
even.— Willd. and Pursh. 

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