A genus of near 120 species widely dispersed through 
both hemispheres, from Siberia to New Holland. 
325. VITTARIA. Smithe” we 
Sori linear, continued longitudinally Mong 
the disk or towards the margin of the frond. 
— double, uninterrupted, the one opeh- 
_ ing outwards, the other inwards. 
Fronds narrow, very long and linear, pendulous. 
Species. 1. V: lineata. A fern indigenous to —— 
and the West Indies. 
“326, BLECHNUM. £. — = 
Pic’ 
a 
Sori linear, longitudinal, continaéd, parnlicl : 
with the ribs of the frond on cither side. Indu- 
sium superficial, uninterrupted, opening in- 
~ Wards. 
 Specigs. 1. B. boreale. Also indigenous to Europe. 2. 
ae er au. 
. WOODWARDIA. Smith. wie 
_ Seri oblong, distinct, straight, parallel with 
- ‘the ribs of the frondon either side. Indusia su- 
=werhcial. arched, opening inwards. 
Species. 1. W. Onoclesides. In New Jersey, near Phi- 
- Tadelphia, not uncommon in bushy sphagnose morasses, 
with the following. Searcely a congener with W. virgi- 
. . 2. virginica: 3, thelypteroidea. Pr. 
B98. ADIANTUM. Z. i, ee eee ee 
gs Sori oblong or roundish. Indusia membrana- 
ceons, arising from the margin of the frond and 
opening inwards. . 
Srrcies. 1. A. pedatum. Every ¥ 
— western states. 
apeins * inwards. — 
a 
ste with a “amir and erccak “Indu- 
