24 KEY TO GENERA AND SPECIES 



Fig. 45. Tulip Tree. 



White Wood, Yellow Poplar, Liriodendron 

 Tulipifera L. 



36. Leaves rounded or pointed at apex. Margin 

 wavy, with no distinct teeth nor bristle- 

 tipped lobes, larger indentations of the 

 margin not exceeding of the distance to the 

 midrib. (See Figs. 46, 171.) 37. 



36. Leaves rounded or pointed at apex. Margin 

 with distinct teeth or small notches, or with 

 a few bristle-tipped lobes or angles. (See 

 Figs. 47, 196.) 39- 



37. Base of blade unsymmetrical. 

 New Brunswick southwest- 

 ward. (Fig. 46.) Witch Hazel, 

 Hamamelis, Hamamelis vir- 

 ' giniana L. 



37- Base of blade nearly or quite 

 symmetrical. Buds short, not 



