46 College of Forestry. 



the beauty of its general form, give it in all these points the 

 first place for street planting. But the elm is subject to 

 serious injury from many insects such as the Leopard Moth, 

 Elm Leaf Beetle, Elm Bark Louse, Tussock Moth and others. 

 Where roots of the elm can penetrate readily through soil 

 that is under lawn areas it may be planted with success near 

 pavements and sidewalks. But it is not good practice to 

 plant elms too extensively in any of our cities. The cost of 

 yearly spraying to preserve them will be great if towns and 

 cities have elms for a large proportion of the street trees. 

 The elm is better suited for towns and villages than for the 

 cities. It is not uncommon to find American Elms that have 

 grown as shade trees for 200 years or more. However, many 

 of the grand old specimens are being removed on account of 

 death due to the work of insects. 



4. EUROPEAN LINDEN (Tilia vulgaris). 



The European Linden is a hardy, moisture^loving tree 

 but like the elm it will grow in a variety of soils. The 

 Lime Tree, as it is sometimes called, is a good symmetrical 

 tree quite formal in its outline, and produces a fairly dense 

 shade. Unfortunately this tree is not free from diseases or 

 the attacks of insect pests. Nevertheless it is a fairly good 

 city street tree and where it can have good soil, it should be 

 more generally planted. The blossoms of the tree are 

 fragrant and showy and are followed by persistent small 

 nut-like fruits. The linden grows rapidly in a good, moist 

 soil. Where these conditions for growth are present, the 

 linden will reach a verv old age. 



6. CRIMEAN LINDEN (Tilia dasysiyla). 



Of all the lindens the Crimean variety is the best for street 

 planting. It is extremely hardy and will grow in any soil 

 that is at all favorable for plant life. The Crimean Linden 

 is a very ornamental tree and one that supplies a good 

 quality of shade. The leaves of this tree are thick and 

 leathery and they seem to withstand the dust from streets 

 and roadways although the foliage is subject to the attacks 

 of the same insects and the blight that preys on the other 



