100 ASPIDIUM 



MALE FERN: Aspidium Filix-mds. 



{Nephrodiumj Dryopteris.) 



Fronds 1 to 4 feet long^ lance-shaped, standing 

 in circles; pinnae narrowly lance-shaped, tapering 

 from the base toward the apex; pinnules oblong, 

 blunt, sharply toothed at the apex, obscurely so 

 at the sides, the basal lobed and distinct; stipes 

 scaly. 



Fruit dots nearer the midvein than the margin, 

 usually confined to the lower half of each fertile 

 pinnule. 



Found in rocky woods from the far north to 

 Newfoundland, Nova Scotia, northern Vermont, 

 Lake Superior, Lake Huron, Dakota, Arizona and 

 California. 



