12 OSMUNDA 



CLAYTON'S FERN; INTERRUPTED FERN: 



Osmunda Claytoniana. 



Sterile and fertile fronds dissimilar; sterile 

 fronds large, pinnate; pinnae lance-shaped, deeply 

 pinnatifid into numerous blunt divisions. Fertile 

 fronds usually taller than the sterile, 2 to 4 feet 

 high; sporangia borne on much transformed pinnae 

 near the middle of frond, greenish in appearance 

 at first, afterward turning brown. 



Found in low grounds from Newfoundland to 

 jMinnesota, south to North Carolina, Kentucky and 

 Missouri. 



