CROUP VI FERTILE AND STERILE FRONDS LEAF-LIKE 

 AND USUALLY SIMILAR; FRUIT-DOTS ROUND 



instead of tapering base of the frond, by the strongly 

 revolute margins of the fertile frond, and by its 

 long stalk. 



From the Massachusetts Fern it may be distin- 

 guished by its forked veins, the less revolute mar- 

 gins of the fertile frond, and by its thicker texture 

 and deeper green. 



39. MASSACHUSETTS FERN 



Aspidium siwulatum (Dryopteris simulate?) 



New Hampshire to the Indian Territory, in wooded swamps. One 

 to more than three feet high. 



Fronds. Oblong-lance-shaped, little or not at all narrowed at 

 the base, rather thin, pinnate ; pinna lance-shaped, cut into oblong, 

 obtuse segments, which are slightly reflexed in the fertile fronds, 

 veins not forked ; fruit-dots rather large, somewhat distant ; indu- 

 sium "withering-persistent." 



This species closely resembles the Marsh Fern. 

 The less revolute margins of the fertile frond, the 

 simple veins, its thinner texture, and its more distant 

 fruit-dots aid in its identification. It is found in 

 woodland swamps from New Hampshire to the 

 Indian Territory. 



