STREET TREES. 



31 



Although the sycamore mai)le ' is similar in appearance to the 

 Norway maple, it is not a satisfactory street tree in the eastern 

 United States. It succeeds, however, ii^ regions 1, 2, 3, and 4. 



Of the trees used for street planting the oaks are best. They 

 probal)ly have not been more widely planted because of the preva- 

 lent belief that they are slow growers and because in the North they 

 are rather difficult to transplant. Although some of the hand- 

 somest species, like the white oak and live oak, are slow growers, 

 those suitable for street 

 planting are compara- 

 tively rapid growing. 

 The white oak and su- 

 gar maple shown in fig- 

 ure 22 are each 32 years 

 old and although dif- 

 fering in shape are prac- 

 tically the same size, 

 yet the sugar maple 

 is considered a suffi- 

 ciently rapid growing 

 tree to be planted fre- 

 quently as a street 

 tree, whUe the white 

 oak is seldom so used. 

 The oaks are hardy, 

 most of them are long 

 lived, and for the most 

 part they are free from 

 disease and insect at- 

 tacks. Some of the 

 southern species are 

 subject to attacks of 

 mistletoe. 



The California live oak ^ is an evergreen suitable for use in region 2 

 and succeeds adjacent to the ocean. It is also useful in region 3 

 and in the western part of region 5. It is easily transplanted if 

 handled young, and especially so when planted from pots. 



The chestnut oak ^ is a native of gravelly soils on eastern moun- 

 tains and is suitable for gravelly soils in suburban locations in 

 regions 9, 10, and 11. It is a large, handsome tree. 



The Darlington oak * is a form of laurel oak especially desirable 

 for street planting. It is large, round headed; the leaves are a trifle 



P16662HP 



Fig. 22.— a sugar maple (on the left) and a white oak (on the right), 

 each 32 years old and nearly the same size. 



1 Acer pseudoplatanus L. 



2 Quercus agrifnlia Nee. 



3 Quercus montana Willd. (formerly Q. prinus). 

 i Quercus laurifotia Michx. 



