32 KEY TO GENERA AND SPECIES 



59. Leaves abruptly cut off or indented at the 

 broad apex. Central New England south- 

 ward and westward, also cult. (Figs. 44, 

 45.) Tulip Tree, White Wood, Yellow Pop- 

 lar, Liriodendron Tulipifera L. 



59. Leaves pointed or rounded at the apex, not 



indented 60. 



60. Twigs bright or shining green, bark spicy aro- 



matic when bruised. Central New England 

 southward and westward. (Figs. 29, 30, 31.) 

 Sassafras, Sassafras variifolium (Salisb.) 

 Ktze. 



60. Twigs not spicy aromatic Oak, 126. 



NOTE. The Fern-leaved Beech (occasionally 

 planted), with smooth gray bark, long 

 pointed buds, and deeply divided leaves, 

 may be sought here if the leaf margins are 

 less deeply cut than usual. 



61. Branches thorny. English Hawthorn 159. 



61. Branches not thorny 62. 



62. Bark whitish and papery. Cult. Cut-leaved 



Birch, 114. 

 62. Bark not whitish and papery Oak, 126. 



NOTE. The Fern-leaved Beech (occasionally 



