TREES IN TOWNS 35 



Cypresses or Retinisporas, the foliage of which is graceful and the 

 habits charming. The Arborvitses, especially the Chinese species, are 

 very handsome. For mass planting, the Hemlock is admirable; the 

 foliage is most dainty; the trees merge into one another very nicely. 

 Recause of the handsome cones and the soft foliage, the Douglas Fir 

 is to be admired. The Rocky Mountain forms are hardy, but the 

 Coastal Plain form is not best for planting in the East. The Irish 

 Juniper is most slender and vertical. Winter snows often get into 

 this tree, spreading the branches and often breaking them. It would 

 seem well to tie the trees up a little before Winter. 



STREET TREES. All trees are not adapted for street planting. 

 Some of them are too rapid growing, so that the wood is soft and the 

 trees short lived. The Poplars well illustrate this class. They are 

 miserable trees, for they break easily in storms; their roots enter the 

 sewer pipes and they heave up sidewalks. Cities which have good 

 forestry control are making the planting of this tree a misdemeanor. 

 The soft Maple, the Sycamore Maple, the European Ash, Rirches, 

 Willows, Tulip Tree and the Rox Elder come in this class. Other trees 

 are objectionable because their attractive fruits and flowers are apt 

 to be picked. In this case, the form of the tree is usually spoiled. 

 Examples of trees of this class are Chestnut, Hickory, Horse Chestnut,' 

 Catalpa, black or common Locust, Magnolia, Dogwood, Mountain 

 Ash. The Catalpa and Horse Chestnut are really objectionable be- 

 cause of their mussy habit of dropping flowers, young fruits or bud 

 scales. 



Good street trees stand adverse conditions, are more or less free 

 from insects and diseases and furnish shade, but not too dense; they 

 are long lived, and those which are arching are preferred by many to 

 the more formal globular forms. Prof. Curtis of Cornell University 

 advises the following trees for various widths of street. 



For narrow streets (less than sixty feet between buildings), the 

 trees should be planted alternately and spaced forty feet apart and 

 the following may be used : 

 PIN OAK. A tree of medium size, more slender than most Oaks; one of 



best trees for narrow streets. Especially likes moisture, but will adapt 



itself to other conditions. , 



GREEN ASH. A small but hardy tree. It is the species Fraxinus penn- 



sylvanica, var. lanceolata. 

 HONEY LOCUST (Gleditschia triacanthos). A very hardy tree; grows well 



in a variety of soils. The foliage is light and does not cast a dense 



shade. It is the Locust with the huge thorns. 

 TREE OF HEAVEN (Ailantus glandulosa). This tree is excellent for dry 



paved tenement sections of cities, enduring smoke and dust. The 



wood is brittle and the trees are dangerous when they are old. 



