52 College of Forestry. 



15. TULIP TREE (Liriodendron tulip f era). 



This tree, often called Whitewood, is one of the most mag- 

 nificent of our large native shade trees. Where there is a 

 good, deep, rich soil and plenty of space along parkways and 

 avenues, the Tulip Tree will make an excellent growth. At 

 maturity it is a splendid tree with large, odd-shaped, glossy 

 foliage and flowers which have high decorative value. But 

 the Tulip Tree is quite subject to scale and other insects that 

 cause the leaves to fall continually during the growing 

 season. In the springtime the opening of the leaves is fol- 

 lowed by the development of large tulip-shaped flowers that 

 are greenish yellow in color. The Tulip Tree is transplanted 

 with difficulty except when special care is exercised in grow- 

 ing and transplanting. Rather small trees can be moved 

 with safety, but large specimens require special methods of 

 handling. This is one of the best of the magnolias for plant- 

 ing in the north. 



16. THOR^LESS HOXEY LOCUST (Gledifschia triacanthos 

 inermis) . 



The Honey Locust is a vigorous, hardy tree that resists 

 smoke and gas well. It adapts itself to a wide variety of 

 soils and is especially suitable for planting in sandy soils 

 where few other trees will grow. It is quite free from 

 insects that attack the other locust trees. The Thornless 

 Honey Locust is somewhat slender and open in its habit of 

 growth and has a fine, delicate foliage and attractive flowers. 

 It requires full sunlight for proper development. 



17. SUGAR MAPLE (Acer saccharum) . 



The Sugar Maple is a valuable tree for planting in right 

 soils. Unfortunately it does not succeed in city streets. It 

 endures cold weather without injury but poor soil and dust 

 and smoke usually found along streets does not furnish the 

 Sugar Maple favorable conditions in which to make a 

 luxuriant growth. Naturally this tree is very beautiful but 

 the city street is not conducive to the development of the 

 beauty of the Sugar Maple. The sugar maple borer and the 

 cottony maple scale are responsible for considerable injury 



