i6 



..a 





The Italian poplar, which grows even more rapidly than the 

 CaroHna, is occasionally used, but it is affected by a rust (Melamp- 

 sora). 



The white poplar is occasionally seen on streets, and makes ex- 

 ceptionally rapid growth. 



The yellow and swamp white oak are handsome trees, and the 

 latter might be used to advantage along country roadsides where the 

 soil is moist. 



Occasionally excellent effects are secured on roadsides by the use 



of white pines, willows, Scotch 

 larches and Norway spruces, the 

 latter sometimes being alternated 

 with decidious trees. 



Many exotic species have recently 

 been introduced, which may prove 

 to be excellent shade trees. Among 

 these may be mentioned the Japa- 

 nese elm, which is a handsome tree 

 of rapid growth. 



The large and unrivalled collec- 

 tion of trees to be seen in the Ar- 

 nold Arboretum furnishes good ex- 

 amples for consideration, and un- 

 Fig.2. Showing entrance to cavity in doubtedly Prof. Sargent would rec- 



tree caused by the removal of large ommend Others worthy of trial, 

 limb and wound not properly cared . ,. ^ ... 



for. Ihis list 01 trees was submitted to 



different persons familiar with the 

 subject of shade trees and their care, in order to obtain their opin- 

 ions in regard to it. Mr. E. W. Breed, Forester of the Massachu- 

 setts Highway Commission, who has had considerable experience in 

 planting roadside trees, states that the first question in determining 

 the varieties of trees to be used should be the soil conditions, and 

 the next, the width of the street, its kind, whether straight, curved, 

 level or hilly, and the obstructions, such as electric wires, poles, etc. 

 He mentions the following trees as being suitable for city and coun- 

 try streets : 



For wide streets, the elm, rock maple and white maple, basswood, 

 red oak and white ash ; and for narrow streets, the Norway maple. 



