LESSON 49 
TREES 
HE purpose of this lesson is to acquaint the pupil 
with the more important species of trees used in 
landscape gardening, and especially those which 
thrive in his own neighborhood. 
General Facts 
Trees may be classified in various ways, according to their 
botanical relationships, according to hardiness, according to height, 
etc. A few of the distinctions most important in landscape garden- 
ing are the following: 
Deciduous trees are those which shed their leaves in winter; 
evergreen trees are those which hold their leaves through the winter. 
A majority of the most valuable evergreen trees are cone-bearers 
(such as pine, spruce, hemlock), but there are also broad-leaved 
evergreens, such as the live oaks. 
Exotic trees are those not native to a given region, especially 
those native to other continents. Native trees have certain ad- 
vantages, particularly in naturalistic landscape gardening. 
The size to which a given species usually grows obviously has a 
bearing upon its use in landscape gardening. 
Studies 
The pup must become sufficiently acquainted with trees to 
recognize all the more important species instantly. This is obliga- 
tory. The best way to acquire this knowledge is through study 
of the trees themselves with the help of a competent instructor. In 
the absence of an instructor who knows trees the student must find 
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