176 



is well brought out in fig. 3. Underneath the canopy formed by 

 the larger trees there usually develop certain smaller arborescent 

 species, viz., Cornus florida, Ostrya virginiana, and Sassafras 

 variifoUum. The rest of the undergrowth, with the exception of 

 some few species like the huckleberry and the blueberries, which 





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Fig. 3. An oak-hickory forest of a very mesophytic tj'pe; Salisbury. The 

 tree in the right foreground is Quercus alba; most of the others are Quercus rubra. 

 The undergrowth includes many of the shrubs listed on page 177. A majority of the 

 young trees are Castanea dentata (i. e., in center foreground) and Acer saccharum. 



flourish equally well in the open or in diffuse light, is made up 

 largely of plants which heretofore either have not been present 

 at all, or else have been poorly represented in the succession. 

 As representative of the shrubs may be cited: 



