Winter Meeting. 229 



The tulip (Liriodendron tulipifera) is another quick growing, very 

 handsome tree sometimes seen on our streets. With age an abundance 

 of flowers are borne which resemble tulips. The trees are difficult to 

 transplant except when very young, and they have the objectionable 

 habit of beginning to drop their leaves early in summer. 



The white or American elm (Ulmus Americana) is very poplar 

 in many cities, especially in the east, but rarely seen here. It has 

 many commendable qualities, long life, moderately rapid growth and 

 wonderful beauty of form. It is objectionable, however, on account 

 of various species of caterpillars which often defoliate the tree, and be- 

 sides its irregularity in growth makes it difficult to secure a uniform 

 avenue of trees. 



Sweet gum (Liquidambar styraciflua) is a very slow growing sort, 

 but one of the most desirable for street purposes. It becomes a medium 

 sized to large tree, with a rounded or somewhat tapering form and very 

 symmetrical in habit. The autumn foliage effects are especially beau- 

 tiful when the leaves turn from their glossy green to a purplish crimson. 

 It is entirely free from injurious insects and fungous diseases. 



The sugar or hard maple (Acer saccharinum) is another very slow 

 growing tree, but otherwise a very good one for stree planting. It 

 does not give the beautiful autumn foliage effects of the sweet gum, 

 but possesses the other good qualities of the latter. The wood is strong 

 and the branches are not easily broken by winds. 



Other species may be preferable for special purposes. These are 

 among the best. There are objections to all of them. Some of these 

 objections may be overcome by a little care. The caterpillars may be 

 kept from the elms ; the silver maple, sycamore and poplar may be 

 timely pruned and will not then be as easily broken by the winds. It 

 is important that some system be inaugurated for the planting and care 

 of street trees as well as the proper selection of varieties, otherwise all 

 varieties will either fail or give very unsatisfactory results, while with 

 proper care the number of successful kinds may be greatly increased. 



It seems important to call attention to some of the mistakes that 

 have been observed. 



In the newer portions of the cities it is sometimes necessary to 

 change a grade where fine specimens of trees are growing. Too often 



