KEY TO THE GENERA 



Fruiting portion on long, woolly, brown stalk. 



Cinnamon Fern, B. 

 Fruiting portion on the tips of twice pinnate fronds. 



Royal Fern, C Large ferns growing in clumps. 



OSMUNDA. 



12 



Fruiting portion in green, 

 berry-like structures, in a 

 twice pinnate spike; sterile 

 fronds broad and coarse. 

 Sensitive Fern. 



Onoclea. 54< 



Onoclea. 



Fertile frond pinnate ; pinnae 

 very narrow, with beaded 

 edges; large species. Os- 

 trich Fern. 



Onoclea. 58 



Onoclea. 



Ophioglossum. 



Fruiting portion on stalk ris- 

 ing above a simple, leaf- 

 like frond; plants small. 

 Adder's Tongue. 



Ophioglossum. 182 



