ii6 THE COMPLETE GARDEN 



in their habit. The poplars are subject to disease as well as being 

 short lived, and the willows are not adapted to shade tree purposes, 

 even in their habit of growth. In spite of the fact that there are some 

 excellent trees as shown in the first and second lists in this chapter, 

 well adapted to street and avenue planting, and thoroughly tested 

 through a period of years, yet many individuals responsible for the 

 selection of these permanent assets or detriments to the public streets 

 will still select trees such as those which are included in the third list of 

 this chapter. 



Trees such as the maidenhair tree, tree of heaven, oriental plane, 

 and pin oak should not be used for street tree planting without a 

 thorough knowledge of the conditions under which they are to grow 

 and the conditions to which they are best adapted. The pin oak 

 and the maidenhair tree are tall, pyramidal trees, which should be 

 used only on wide streets in a heavy soil, and the maidenhair tree 

 should never be used for street and avenue planting except in the less 

 severe climatic conditions. The tree of heaven has a vigorous habit 

 of growth and is an excellent tree in the smoky, congested sections of 

 our cities where shade trees are required. Before trees in this group 

 are used some of the important bulletins and books on our city street 

 trees should be consulted for further information. (See Bibliography.) 



Where an avenue is of such length that it passes through two or more 

 radically different soil types care must be exercised or the trees on one 

 soil will not grow as fast or luxuriantly as upon another soil. This will 

 result in an avenue of uneven height and spread in the tops of the trees 

 and thus spoil an otherwise successful planting. 



LIST OF TREES FOR STREET AND AVENUE PLANTING 



A. TREES WHICH ARE ENTIRELY HARDY UNDER ALL CONDITIONS. 

 This group contains the standard types of shade trees which can be 

 planted under almost any condition of climate or soil, with some degree 

 of assurance that they will develop an interesting normal habit of 

 growth. This list may be termed "the ten best trees for general 

 use in street and avenue planting," in city, suburban, and urban 

 districts. 



Acer saccharum Quercus coccinea 

 Sugar Maple Scarlet Oak 



Quercus alba Quercus rubra 

 White Oak Red Oak 



