FERNS; 



BRITISH AND EXOTIC. 



ASPLENIE^. J. Smith. 



The Ferns included under the family Aspleniem are so well 

 marked, that it would not be easy to mistake the great majority 

 of them. They differ from the PteridecB in the position of the 

 sori, for in this tribe they are parallel with the midrib or 

 margin of the frond, whilst in Aspleniece they are oblique to 

 the midrib, or axis of venation. 



The sori are elongated, venules free or anastomosing, sori 

 simple or binate, having a special .lateral attached, linear, plane, 

 or vaulted indusium. 



The Aspleniece comprise the Scolopendrium, Diplazium, As- 

 pleniurrii Ceterach, Neottopteris , Antigramma, CallipteriSy and 

 one or two other small .tribes. 



VOL. Y. • JB 



