KEY TO GENERA AND SPECIES 39 



Fig. 62. Yellow Wood. 



points or ridges. Leaflets usually 9 to 17 

 Walnut, 1 06. 



75. Exterior husk of fruit splitting vertically into 

 4 parts at maturity. Nut smooth. Leaflets 

 usually 5 to 9 Hickory, 107. 



PINE. Leaves needle-shaped, 2 to 5 in a cluster. 

 Fruit a cone, composed of woody closely 



