24 



Farmers' Bulletin 1208. 



a leaf aphis, 7 which produces yellow spots on the leaves and causes 

 them to drop prematurely; also, the honey dew which they produce 

 is so abundant at times as to cover the leaves and wet the sidewalk 

 beneath the tree, the leaves under certain weather conditions becom- 

 ing blackened with dust accumulating and a fungus growing in the 

 secretion, thereby giving the tree an unsightly appearance. This 

 aphis, however. i.s not always present and does not seriously injure 

 the tree. The Xorway maple comes into leaf later than most of the 



other maples, but 

 holds its leaves later 

 in the fall. They 

 usually assume a 

 bright yellow hue be- 

 fore they drop. The 

 leaves are preceded by 

 an abundance of yel- 

 low - green blossoms. 

 On account of its 

 dense shade and 

 masses of fine fibrous 

 roots it is difficult to 

 grow grass under this 

 tree. Its good shape 

 and attractive dark- 

 green foliage make it 

 popular for street 

 planting in spite of 

 its dense, low head. 

 It will succeed in re- 

 gions 1, 2, 3, 4, 9, 10, 

 11, and 12. 



The Oregon maple, 

 also known on the 

 its poor Pacific coast as broad- 

 leaved maple, is the 

 large-leaved maple of the northern Pacific slope. It forms a large 

 round head, and with its unusually large dark-green leaves makes a 

 very attractive street tree that succeeds well in regions 1, 2, 3, and 4. 

 It is valuable and worthy of more extended cultivation on the Pacific 

 coast. 



The red maple, scarlet maple, or swamp maple is one of the 

 most widety distributed American trees. It is found from Canada 

 to the Gulf of Mexico and west to the Rocky Mountains. Its leaves 

 are the smallest of the eastern native maples, but it grows large and 



FIG. 15. A Norway maple In lato wintor, showin 

 shape when trimmed to a high head. 



