A Street Tree System for Neiv York City 45 



on city streets and possesses much beauty, especially in old 

 age. It has very few enemies, is little subject to disease and 

 is a rapid grower and long-lived. It normally makes a large 

 tree, so is not adapted for use in narrow streets unless kept 

 back by severe pruning. It is well adapted for such prun- 

 ing, and is uninjured by it. This tree is to be used wherever 

 a large tree is desired as on wide streets and avenues, or can 

 be used as noted as a formally pruned, medium-sized tree 

 for narrow streets. 



(2) Gingko blloba (The Maidenhair Tree). 



This tree is extremely hardy and succeeds in very poor soil, 

 and is very free from insects and disease as well as being a 

 tree of considerable beauty. Its chief fault is its slow rate 

 of growth, but for street use where a small-sized tree is re- 

 quired this defect is not serious. It is readily kept either 

 round-headed or pyramidal in form by pruning. This tree 

 would be especially valuable for use in Manhattan on narrow 

 streets or where a formally pruned tree is required. It is 

 doubtful if any tree on our list will succeed so well under ad- 

 verse conditions as the Gingko. 



(3) Tilia vulgaris (The European Linden)* 



This is the tree so much used as a street tree in European 

 cities. It is a beautiful tree in both form and foliage and its 

 bloom is delightful in fragrance. The tree is thoroughly 

 hardy, succeeds under the adverse conditions of a city street 

 and is a rapid grower, yet takes kindly to severe pruning. 



The Linden has received a bad name in ISTew York be- 

 cause many of the varieties which have been used lose their 

 foliage in the warm weather of July and August due to the 

 attacks of the red spider. If the true Tilia vulgaris is used 

 this trouble will usually not be experienced. Great care 

 should be exercised in securing the true species as nursery- 

 men often offer under the name vulgaris another species 



* The author is indebted to the article by F. L. Olmsted and H. J. 

 Koehler in the July number of "Landscape Architecture" for the true 

 nomenclature of the lindens as here used. 



