KEY TO GENERA AND SPECIES 23 



34. Leaves pointed at both ends. Fruit an acorn 



(i. e., a nut with its base set in a woody cup 

 which is composed of closely overlapping 

 small scales) Oak, 126. 



35. Margin with no deep indentations (i. e., not 



more than J of the distance to the midrib). 

 (See Figs. 46, 171.) 36. 



Fig. 44. Tulip Tree. 



35. Margin indented more than J of the distance 



to the midrib, often almost to the base 

 (i. e., lobed or divided). (See Figs. 155, 

 208.) 38 



36. Leaves abruptly cut off or indented at the 



broad apex. Margin with a few large angles 

 or shallow lobes, but with no small teeth. 

 Central New England southward and west- 

 ward, also cult. (Figs. 44, 45.) Tulip Tree, 



