TREES 
Native and naturalized, found in the Northeastern United 
States (Maine to Virginia, and west to the Missis- 
sippi), classified by their LEAVES. 
A very few of the most familiar cultivated foreign trees, 
even though not naturalized, are put into this section, to 
facilitate identification. Those shrubs that are sometimes 
arboreal are here put in parenthesis, and their descriptions 
must be looked for under ¢¢ Shrubs.”’ 
ANALYTICAL KEY 
Trees not ‘‘ evergreen’’ nor cone-bearing (those are 15 1— 
170; see below). 
Trees not thorny nor prickly (those are 135-1503 see 
vs puee), 3 
below ). 
LEAVES SIMPLE: 
ALTERNATE: 
Entire: 
widely distributed within territory : 
leaves thickish and leathery: 1-5, 63 
(‘° Shrubs, *%.92, 93) 
leaves thin: 6-14 
found only on frontier—Virginia, Kentucky, 
Illinois, or northern part of New England 
or of New York: 15-19 
181 
