ROADSIDE PLANTING OF TREES 
93 
likewise be found extremely satisfactory. For the 
South, additional desirable trees are the Sweet Gum, Um¬ 
brella or Cucumber tree, Tulip, Ginkgo and Evergreen 
Magnolia, and in California the Eucalyptus, the Cali¬ 
fornia Walnuts and large leaved Maple on all the Pacific 
Slope, and the Camphor, Silk Oak and Pepper trees for 
southern California. 
On stretches of road where trees are meant to provide 
shelter from wind and storm as well as to furnish shade, 
it is well to use types of trees which adapt themselves to 
what is known as a windbreak. This purpose is effectively 
served in the East by such evergreens as the Spruce, 
Balsam, Cedar and Arbor Vitae, and in less degree by 
deciduous trees, while in the West only deciduous trees 
are available except in California, where the Eucalyptus 
is the most important for this purpose. 
In roadside planting, trees should be in rows, follow¬ 
ing the alignment of the boundary fences or property 
lines on some straight roads, but irregularly placed on 
winding roads. When in straight lines, uniform spacing 
is important, and there should also be uniformity as to 
species, size and shape in order to secure the most satis¬ 
factory landscape effect. As to spacing, a distance of at 
least 80 feet between trees should be allowed, to give 
room for proper development and to prevent such density 
of shade as will hamper the growth of crops near at hand, 
and interfere with the view from the roadway. In 
providing windbreaks, it is desirable, of course, to have 
the trees much closer, and often more than one row on 
each side is desirable. 
Shrubs, too, have their place in roadside ornamenta¬ 
tion, and their use should be encouraged. Whether in 
groups of their own or used with trees, they greatly enrich 
the landscape. In some spots, where trees cannot be 
