149 



GENUS IV. 



CETERACH. Willdenow. 



A SMALL family of dwarf Ferns, all rare except one British 

 example, CeteracJi qfficinarum. 



Fronds pinnate or sinuose-pinnatifid, beneath the frond densely 

 squamose. 



The veins forked and anastomosing. 



Sori oblong, protruding through the squamae. 



Indusium obsolete. 



Fee gives the following: — C. qfficinarmn, C, latifolitim, C. 

 capenssy and C. cordatum. 



