74 



FERNS 



FIG. 38. Filicales. Spore-bearing fronds. 1, Clayton's fern (Osmunda 

 Claytoniana) with only the central pinna spore-bearing; 2, royal fern 

 (Osmunda regalis) with the apical pinnae spore-bearing; 3, cinnamon fern 

 (Osmunda cinnamomed) with the entire frond spore-bearing; 4, sensitive 

 fern (Onoclea sensibilis'), the entire frond spore-bearing. 



