88 KEY TO GENERA AND SPECIES 



Fig. 161. 

 Scrub Oak. 



Fig. 162. Black Jack 

 Oak (with bristles). 



Fig. 163. Black Jack 

 Oak (without bristles). 



135- 



135- 



stalk. Leaves greatly broadened at the 

 apex, usually with no pronounced lobes; 

 lower surface rusty-hairy. Long Island 

 southward and westward. (Figs. 162, 163.) 

 Black Jack Oak, Jack 

 Oak, Quercus marilandica 

 Muench. 



Lower surface of the mature 

 leaves smooth, or nearly 

 so 136. 



Lower surface of the mature 

 leaves hairy 140. 



136. Leaf-margins with many 

 coarse rounded teeth which 

 do not reach more than | 

 of the distance to the midrib 137. 



136. Leaf-margins lobed 138. 



