Key to the Principal Tree Families 



DD. Bases of leaves unsymmetrical. i 



E. Fruit, a berry; leaves with three man | 



veins; bark warty. The Hackbe'ries \ 



EE. Fruit dry with circular wing; leaves oval j 



with prominent, straight veins. The Elms i 



EEE. Fruit a woody ball on leaf-like blade; ' 



leaves large, distinctly one-sided. 



The Lindens, or Basswcods 



CC. Leaves compound. , 



D. Fruit, a flat pod. The Locists \ 



DD. Fruit, a nut. \ 

 E. Husk opening when ripe by four valves. 



The Hie hones \ 



EE. Husk not opening when ripe. The IValnuis i 



i6 



