Photo by W. L. Bray. 
Fie. 37. Ground cover of American shield-fern (Dryopteris intermedia) 
under climax forest of Zone D (Canadian-Transition) near Cranberry Lake. 
Photo by W. L. Bray. 
Fig. 38. Ground cover of American shield-fern as in fig. 37. Polypody 
on ledge at right. Cranberry Lake. 
