SELECTION OF TREES FOR PLANTING 



61 



early in the autumn. During the winter the tree has a 

 beauty and grace similar to that of the Red Maple. It may 

 be pruned into a low, spreading crown. It is more sus- 

 ceptible to insect attacks than the Norway and Red Maples 

 and suffers from borers, scale and leopard moths. 



Big Leaf Maple. The Big Leaf Maple is a strikingly 

 handsome native of Oregon, Washington and California, 

 with normal height ranging 

 from thirty to sixty feet, 

 and under the best condi- 

 tions reaching ninety feet. It 

 is much used as a shade tree 

 in the Pacific Coast states. 

 This species requires deep, 

 rich soil, but thrives from 

 the Sierra Nevada Moun- 

 tains to the Coast, and is one 

 of the best for that country. 



Silver Maple. As in the case of the Carolina Pop- 

 lar, the Silver Maple has been much planted because 



of its rapid growth. This 

 tree is also proof against 

 many of the hardships of 

 city life, but it is undesir- 

 able in most of the country 

 because of its early loss of 

 strength and resultant de- 

 cay and the damage to pave- 

 ments caused by its bulging 

 surface roots. The tree lit- 

 ters the street through the 

 breaking and dropping of its brittle branches, and heavy 

 storms often break off large limbs. When sleet storms 

 occur, this tree is usually the first to be damaged. Damage 



