84 KEY TO GENERA AND SPECIES 



128. Lobes or marginal teeth ending in a bristle 

 129. 



128. Lobes or marginal teeth not ending in a bris- 

 tle 135. 



Fig. 153- Fig- 154- 



Water Oak. 



Fig. 157. Black Oak. 



129. Lower surface of mature leaves smooth, or 



nearly so 130. 

 129. Lower surface of mature leaves hairy 133. 



