80 SHADE-TREES IN TOWNS AND CITIES 



ONE SPECIES ON A STREET 



Not only to obtain variety but also to offset the whole- 

 sale spread of tree diseases, it is important that as many 

 good shade-trees as possible should be planted in a city. All 

 the specimens on a street, however, should be of the same 

 kind. When such a plan is followed there is secured in- 

 creased stateliness, impressiveness, and charm. The beauty 

 and uniformity that are produced by a repetition of the 

 same object are lost when a mixture of species differing in 

 habits of growth and in foliage is introduced, and it is as 

 much at variance with good taste as would be a mixture of 

 orders in the columns of a temple. 



Streets that have become famous for their beautiful 

 shade-trees, both in this country and abroad, are planted 

 with one variety. No better illustration of the effective 

 results of uniform planting can be found in America than 

 in the city of Washington. Some of the most imposing 

 streets are New Jersey Avenue, nearly three miles in length, 

 lined with four rows of American elms; Massachusetts 

 Avenue, three and a half miles in length, planted with 

 American lindens; Indiana Avenue, set with oriental planes, 

 and Pennsylvania Avenue, with pin oaks. In the capitals of 

 Europe the plan of planting one species of tree on a street is 

 also followed. 



What Determines the Choice of Species. — The factors 

 which determine the choice of species for a particular 

 street are the width of the street, the nature of the soil, 

 particular local conditions and the general character of 

 the trees in a row as contributing to the beauty of the 

 street. 



