92 KEY TO GENERA AND SPECIES 



142. Leaf-margins with many coarse rounded teeth. 

 Leaf-base tapering. Southern Me. south- 

 ward and westward. (Figs. 164, 165.) 

 Chestnut Oak, Rock Oak, Rock Chestnut 

 Oak, Quercus Prinus L. 



142. Leaf-margins with many coarse sharp teeth. 



White Oak. 



Leaf-base tapering. Vt. and southward, 

 mainly along the mountains. (Fig. 172. 

 Leaves often wider than shown in the illus- 

 tration.) Yellow Oak, Chinquapin Oak, 

 Chestnut Oak, Quercus Muhlenbergii En- 

 gelm. 

 142. Leaf-margins with angles or lobes rather than 



