THE PLACING OF SHADE TREES 
7i 
planted at liberal distances apart. Because of better soil 
and light conditions, one row usually develops more rapidly 
and more vigorously than the other, producing a ragged 
and uneven effect. The plan is not recommended unless 
there is the ideal condition of abundant space. By alter¬ 
nating the trees, that is, putting them first on the outside of 
the sidewalk and then ontheinside,theeffectof adoublerow 
may be produced in a narrower space than where all 4 trees 
are placed in a straight row across the street. See diagram. 
Turf 
* Tree 
Tree 
* 
Sidewalk 
* Tree 
Tree * Turf 
Roadway 
Turf 
* Tree 
Tree 
* 
Sidewalk 
* Tree Turf 
* Tree 
(3) With Center and Side Planting— This also is 
an extension of Plan 1. It calls for one or two rows of trees 
down the center of the street, in addition to a row on each 
side. This type of planting is used on streets of consider¬ 
able width which have no interfering car tracks. The 
plan involves a grass-grown or gravel covered parking 
strip in the center of the street, and the effect is extremely 
attractive. The trees in this parking strip may be in single 
or double line. On Pennsylvania Avenue southeast, and 
New York Avenue northwest, of the United States 
Capital, as well as streets in Jacksonville, Florida, New 
Orleans, Louisiana, Augusta, Georgia, and many other 
cities, the trees are in double line, separated by double 
street car tracks. This particular arrangement naturally 
calls for a great deal of space. Because of their width of 
150 feet or more, these streets can accommodate the double 
