S52 CRYPTOGAMIA.. FILtCES. 



A genus of near 120 species widely dispersed through; 

 both hemispheres, from Siberia to New Holland. 



825. VITTARIA. Smith, 



Sori linear, continued longitudinally along 

 the disk or towards the majgin of the frond. 

 Ivdusium double, uiiinterrupted, the one open- 

 ing outwards, the other inwards. 



Fronds narrow, very long and linear, pendulous. 

 Species. 1. V. Uneata. A fern indigenous to Florida 

 and the West Indies. 



826. RLECHNUM. L. 



Sori lifiear, longitudinal, continued, parallel 

 with the ribs of the frond on either side. Indu- 

 slum superficial, uninterrupted, opening in- 

 wards. 



Species. 1. B. boreale. Also indigenous to Europe. 2. 



.terriilahtm. 



S27. WOODWARDIA. Smith. 



Sori oblong, distinct, straight, parallel with 

 the ribs of the frond on either side. Iniitisia tiM-- 

 perficial. arciied, opening inwards. 



Species. 1. W. Onocleoides. In New Jersey, near Phi- 

 ladclpliia, not uncommon in bushy sphugnose morasses, 

 with tlie following, ifcarcfly a congener with It', vir^- 

 nicd. 2. viryi/iica. 3. thelypteroides. l*H. 



858. ADIANTLM. L. 



Sori oblong or roundish. Indusia membrana- 

 ceous, arising from the margin of the frond and 

 opening inwai'ds. 



Species. I. A. pedatutn. Every where throughout the 

 Atlantic and western states. 



^^9. CHEILANTHKS. Swart%. 



5^07'i punctiform, distinct, and marginal, each 

 covered with a squamiform and marginal Indu- 

 fi\um opening inwards. 



