ARBORICULTURE 



39 



That the Vermont maple syrup is some- 

 times made from this tree is no discredit to 

 the tree. 



Norway maple (Acer platanoides) is an 

 excellent, hardy tree, not a slow grower if 

 well cared for. 



Of course if a posthole is dug and a root- 

 less tree is crammed into the hole, the hard 

 maple will not survive, while the silver maple 

 may; but give the hard maple fair treat- 

 ment, a large hole well filled with rich soil 

 and a moderate quantity of water, and they 

 will grow nearly as fast as other trees and 

 last ten times as long. 



There are several sub-forms of the Nor- 

 way which are admired for their color or 

 some peculiarity, all of which are good and 

 may be grown here. 



ELM. 



From what I can discover after close ob- 

 servation the American elm and the English 

 elm are both successful here. The elm re- 

 quires plenty of water, and you are giving 

 them enough. In the Eastern states, the 

 elms are dying; borers, leaf rollers and 

 other insects are doing much injury to them, 

 but so far as I can judge, the greatest 

 cause is a short supply of water. You may 

 not be seriously troubled with elm insects, 

 but do not plant all elms, ere you some day 

 lose them. 



GINKGO. 



This tree was imported from .Japan some 

 forty or fifty years ago and is among the 

 finest avenue trees of Washington City. 



It is growing finely in Colorado and every 

 other state in the Union. The leaves are 

 unique, bright green foliage, fan-shaped, 

 narrow at the stem end. Its fruit, a deli- 

 cious nut, with paper shell, enclosed in a 

 disagreeable fruit pulp, the size of a plum. 



Under good culture its growth is by no 

 means slow. It is suited to the lawn better 

 than as a street tree. 



RUSSIAN OLIVE 



is a fine arid region tree; very satisfactory 

 and numerous at Denver and some at Colo- 

 rado Springs. Its silvery foliage gives va- 

 riety to surrounding trees. 



TULIP TREE. 



{Liriodendron tulipifera) is the grand forest 

 tree of Indiana and elsewhere, called yellow 

 poplar. It is a clean, rapid growing, hand- 



some street tree, or for the lawn. A few 

 are growing in Denver, and I have no doubt 

 it will be perfectly satisfactory here. Rath- 

 er difficult to transplant, like the Magnolia 

 family ; and should be removed only in 

 spring. Small trees are more successful 

 than larger ones. 



LINDEN OR BASSWOOD. 



grows well in Colorado and makes a good, 

 dense shade, having a round head and being 

 a handsome tree. 



When trees of this smooth-like bark are 

 trimmed up with long trunks, the sun scalds 

 the bark, 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 far 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 be- 

 tween 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 



