7 
moist sliady banks. Generally distributed, but not common, the 
stations being usually small. Middle of August. Asia. 
108. A. fiHx=foemina (L ) Bernh. Lady Fern. Usually tall, 
6 inches to 5 feet ; laminae twice pinnate, pinnules lance-linear, in- 
cised ; sori short, curved, finally confluent. August to October. 
Throughout the world. Very variable, the following being the 
most distinct native varieties : 
a. Var. exile D. C. Eaton. Small, growing in very dry situa- 
tions. Not common. 
b. Var. angustum D. C. Eaton. Laminae narrow ; pinnae ob- 
lique, ascending, at length confluent In dry situations fully ex- 
posed to the sunlight. 
c. Var cyclosorum Rupreclit. Fronds very large, often 4-5 feet 
high, 18-20 inches broad, nearly tripinnate ; sori nearly annular. 
Wet places in the open sun. 
CAMPTOSORUS Link. 
Sori oblong or linear, partly on veins paralled to the midvein, and 
partly on oblique veins, causing them to appear irregularly 
scattered. 
no. C. rhizophyllus (L.) Link Walking Fern. Fronds 
lanceolate, 6-12 inches long ; laminae usually auricled at the base, 
and gradually tapering into a slender prolongation which often 
roots at the point. Shaded calcareous rocks. Mt. Toby, Leverett, 
Mass. ; Lebanon, N. H. ; Shapleigli, Me. ; and not rare in Western 
New England. Forked fronds of this species are occasionally found 
with a little plant growing at each prolongation. August. North 
America, principally east of the Mississippi. 
Illustrated in Gray’s Manual, and by Meehan, Series n, Vol. 1. 
Tribe IX, A.SPIDIE^. 
Sori round or nearly so, on the back or rarely on the apex of a vein 
and furnished with special indusia, (wanting in Phegopteris.) 
With us, five genera, including twenty-four species. 
