the fronds and of the pinnae (sometimes elongated and pinnatifid), 
yet it is a species easily recognized by the large size among our 
pinnated Asplenia, and the stout ebeneous stipites. 
Plate 31. Fertile fronds of Asplenium marinum , Linn .,—natural size. Fig. 1 
and 2. Pinnae,— magnified. 3. Sorus ,—more magnified. 
