57 



2. Hardwood growth on the ridges. 



3. Hardwood growth in the depressions. 



The most important trees are the following: — 



On the ridges — 



White pine, Pinus strobus, L. 



Bur oak, Quercus macrocarpa, Michx. 



Chestnut oak, Quercus prinus, L. 



White oak, Quercus alba, L. 



Hard maple, Acer saccarinum. 



Beech, Fagus ferruginea, Ait. 



Tulip tree, Lyriodendron tulipifera, L. 



Basswood, Tilia americana, L. 



In the depressions — ■ 



Red oak, Quercus rubra, L. 

 Black oak, Quercus coccinea tinctoria, Gray. 

 Scarlet oak, Quercus coccinea, Wang. 

 Swamp white oak, Quercus bicolor, Willd. 

 Black ash, Fraxinus sambucifolia, Lam. 

 White elm, Ulmus americana, L. 

 Silver maple, Acer dasycarpus, Ehrh. 

 Red maple, Acer rubrum, L. 

 Bitternut hickory, Carya amara, Nutt. 



In addition to the above there occur in less abundance 

 black walnut, butternut, shellbark and mockernut hick- 

 ories, yellow birch, sycamore, red elm, white ash, black 

 cherry, white birch, aspen, large toothed aspen poplar, 

 balsam poplar, hop hornbeam, blue beech and sassafras. 



