110 Forest Clul) Annual 



the appearance of being covered with soot. A good rich soil 

 is needed and a great amount of moisture is necessary in order 

 to keep the tree in proper condition. 



European Linden (Tilia enropea Linn.). 

 Superior to the American Linden on account of its smaller, 

 more compact crown and denser foliage, few trees surpass the 

 European Linden as a shade tree. The branches are drooping 

 when left to grow naturally but when trimmed they take a 

 graceful upward turn. The tree is also subject to insect at- 

 tacks but is generally less subject to injury due to unfavorable 

 conditions in the city than is the native tree. 



The Elms. 



White or American Elm (Ulmus americana Linn.). 

 This species is especially adapted to planting on wide 

 streets and requires a deep, moist soil. The tree develops a 

 large, broad-topped, over-arching crown with gracefully 

 drooping branchlets. The foliage generally remains for a 

 long time but has no brilliant coloring in autumn. Insect 

 enemies are quite numerous especially in eastern cities, and 

 spraying is resorted to in order to prevent its defoliation. It 

 should not be planted unless there is plenty of room for the 

 crown to develop, since on the ordinary street there is no room 

 for full growth, and consequently the beauty of the fully 

 developed crown is not attained. 



English Elm (Vlmus campestris Linn.). 

 This European species is often planted in place of the 

 native tree. It has nothing to recommed it over the White 

 Elm and is less striking in form and even more subject to 

 insect enemies than is the native species. 



The Sycamores. 



American Sycamore (Plantanus occidentalis Linn.). 



The Sycamore grows to good size over a large range and 

 develops into a splendid and shapely tree. The tree is hardy, 

 grows rapidly, and when properly pruned forms a compact, 

 well-rounded crown. The leaves are large but do not form too 

 dense a shade. The young leaves are often attacked by a 

 fungous disease which causes them to turn brown and shrivel 



