TREES IN TOWNS 35 



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

 habits charming. The Arborvitaes, 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. 

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

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

 Coastal Plaia form is not 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 Uttle 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 Uved. 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 Emopean Ash, Birches, 

 Willows, Tulip Tree and the Box 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. 



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

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

 are long Uved, and those which are arching are preferred by m£uiy to 

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

 advises the foUowing 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 apeirt 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,1^enduring smoke and dust. The 



wood is brittle and the trees are dangerous'iwhen they are^old. 



