PLANTING AND CARE OF TREES 79 



Eed Oak 45 " 



Chestnut Oak .45 '' 



Pin Oak 40 " 



Tulip 50 " 



Common Locust 45 '^ 



Honey Locust 40 '^ 



White Ash 45 " 



Linden 40 " 



Horse Chestnut 35 " 



Sweet Gum 35 " 



Ginkgo 35 '' 



Hackberry 35 ^' 



Ailanthus 30 '' 



Carolina Poplar 30 " 



Lombardy Poplar 25 " 



Hardy Catalpa 30 " 



Kentucky Coffee 30 " 



It is not always practicable to place trees at regular distances, 

 for they must be made to fit in a given stretch between cross streets. 

 In some places the trees are arranged along the street. in relation to 

 the abutting property. This is not right, for such an arrange- 

 ment is likely to lack uniformity. It is usually best to have the 

 trees regularly spaced and where the street is wide enough for 

 their full development they should be planted opposite one an- 

 other. On narrow streets, for the sake of giving them more room, 

 the trees on one side of the street may be planted opposite the 

 spaces on the other side. The chief objection to this method of 

 arrangement is the uneven appearance that it presents at the street 

 intersections. Whether planted opposite or alternately the rows 

 should not extend exactly to the corner, for in such positions they 

 are more likely to be injured and are also likely to interfere Avith 

 the illumination of the streets. 



Permanent and Temporary Planting — It is always advisable to 

 plant long-lived trees on city streets. There is always a tempta- 

 tion, for the sake of getting early results, to plant rapid-growing 

 species. The rapid-growing species are usually short-lived, and 

 for this reason are objectionable. While it is usually best to plant 

 only one species on a given street it is sometimes permissible to 

 alternate the permanent trees with trees of a quick-growing spe- 



