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 Vitse, 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 



