STREET TREES. 27 



LINDEN. 



The basswood/ or linden, is a large round-headed tree that is 

 excellent for roadsides in surVjurban locations and does well on city 

 streets if the conditions are not too severe. On account of the dark 

 upper surface and the lighter under surface of the leaves and the 

 sweet-scented blossoms in early summer it is much admired. It is 

 not as reliable as some of the other shade trees, as when young it is 

 sometimes attacked at the base of the trunk by a fungous growth 

 that kills the tree. When once established it forms handsome avenues. 

 It is suited to regions 1, 2, 3, 4, 7, 9, 10, and 11. 



The linden,^ or European linden, has much smaller leaves than the 

 American linden, or basswood, with more contrast between their 

 upper and lower surfaces. It is not much different in size, but is 

 a little more compact in growth and holds its leaves longer in the 

 fall. It is a useful tree for street planting in regions 1, 2, 3, 4, 9, 

 10, and 11. 



LOCUST. 



The locust,^ or black locust, is one of the desirable street trees in 

 regions 6, 7, 8, and probably in region 5, as it thrives with com- 

 paratively little moisture. It makes a moderate-sized oval head 

 that bears sweet-scented white flowers in late spring or early summer. 

 Its greatest drawback is its liability to serious injury and disfigure- 

 ment by the locust borer,* but with proper care this injury can be 

 prevented.^ In some parts of the East it is also subject to a leaf 

 miner ^ that gives its foliage a burned appearance. In region 3 it 

 holds its seed pods for several years and thus becomes very un- 

 sightly. 



MAGNOLU. 



The evergreen magnolia "^ is one of the few good evergreen trees 

 for street planting, but it is adapted only to regions 1, 2, 3, 11, 12, 

 and 13. There are but few conditions that warrant the planting 

 of a tree having foliage as thick as this, because of the dense shade, 

 which is especially undesirable in winter. It grows to be a large 

 oval-headed tree and bears beautiful large white blossoms in late 

 spring or early summer. 



MAPLE. 



Among the maples are some undesirable trees much used for 

 street planting and some that are valuable only in restricted areas 

 or under special conditions. The maples are not as satisfactory for 



> Tilia americana L. 



■ Tilia platyphyllos Scop. 



^ Eobinia pseudacacia L. 



* Cylene robiniae Forst. (Data furnished by the Bureau of Entomology). 



s See U. S. Dept. of Agriculture Bulletin 787, entitled " Protection from the Locust Borer." 



6 Chalepis dorsalis Thunb. 



' Magnolia grandi]< a L. 



