DESCRIPTION OF TREES. 



139 



overcome by heading in all but the central leading branch, 

 until it has become well established, as with the elms, shown 

 in Fig. 23. This species thrives on all kinds of soil, but 

 makes the best growth in a rather moist, deep soil. 



WHITE ASH (Fraxinus Americana). In growth this 

 tree is very much like the sugar-maple with a little less of 

 the conical form. The foliage is of a dark, rich color and 

 free from insects and fungous pests. It is rather easily 

 broken down by ice and wind-storms, and requires a heavy 

 soil for its best development. 



BED OAK (Onerous rubra). Of the oaks this and the 

 next species are the best for street decoration, but they can 

 only be used along narrow roadways by training the 



FIG. 74. RED OAK PRUNED TO MAKE BRANCH HIGH. 



branches high. This is best done by keeping the lower 

 branches clipped in, as in Fig. 74, and when strong main 

 branches have been formed high enough to be above all 



