32 FERNS AND THEIR ALLIES 



land, possibly because it is not recognized, and 

 it is not a common species in the southern part, 

 being found only occasionally. 



The Crested Marginal Fern is a hybrid be- 

 tween A. inargitiale and A. cristatum, bearing 

 strong resemblance to the latter. It can be 

 distinguished by its fronds growing in crowns, 

 the very broad upper two-thirds of the fronds, 

 and by the tapering pinnae. 



From the Marginal Shield Fern it can read- 

 ily be determined by the short, obtuse, triangular 

 pinnce of the lower one-third of the frond. 



The fruit-dots are rather large, nearer the 

 margin than the midvein. The indusia are 

 smooth, and convex before mature, in August. 



FRAGRANT SHIELD FERN. 



Aspidiiim fragrans (Dryopteris fragratis). 



Frond nearly twice pinnate, the pinnae deeply 

 parted into crowded, oblong, obtuse, toothed or 

 nearly entire lobes or segments. The stipe and 

 rachis are chaffy. 



The fronds are lanceolate in form, slightly 

 narrowed at the base. They grow in a crown, and 

 are small, being from four to twelve inches 

 high. They are fragrant, whence the name. 



This fern grows in the mountains of north- 

 ern New England, on dry rocks and cliffs near 

 falling water. 



