PRACTICAL ARBORICULTURE 67 



the sun scalds the bai, when borers get a hold and destroy the trees. If trees . 

 must be pruned high, as for street planting, the trunk should be wrapped or 

 a box provided which will shade the trunk from the sun. The European 

 linden is superior to our American variety. 



THE SYCAMORE OR PLANE TREE. 



The Oriental plane is far superior to our common sycamore. It is hardy 

 at Denver, and doubtless will be so found at Colorado Springs. An avenue 

 of Oriental plane is a very beautiful object. 



By the way, if some agreement could be had by property owners by 

 which each street should be planted with one special tree placed at distance 

 of, say, thirty feet between the temporary cottonwood, soft maple, etc., the 

 final result would be most satisfactory in enhancing the attractiveness of this 

 tourist city. 



MULBERRY. 



There are several varieties of mulberry which thrive here; they have 

 handsome foliage, the fruit is acceptable to your birds and occasionally to 

 the children ; but they should never be set as street trees, since the falling 

 fruit becomes disagreeable to passers by. Plant them on the lawn, rather in 

 the rear, if only for poultry and birds. 



Russian mulberry makes a nice hedge if kept pruned and is a forest tree 

 of small growth. 



BIRCH. 



All the birches seem to thrive here, but as a lawn tree the cut-leaved 

 weeping birch is the finest. Common white or paper birch is very fine. 



Do not forget that the Catalpa speciosa is one of the most successful 

 trees in Denver and your own city. And while planting trees, if you neglect 

 the oaks, you will regret it. 



The red oak (Qucrcus rubrum) is a rapid growing tree. 



The pin oak (Quercus palnstris) is probably the finest shade and street 

 tree of the oak family. There should be avenues of oak which seem to be 

 satisfactory in Colorado if not at too high an altitude. 



Plant trees. Plant a variety of trees. Plant very many trees and make 

 your city one of the handsomest places on God's footstool. 



