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In general, trees which are selected for street planting should besymmetrical in character, they should be long lived, and they shouldnot be readily susceptible to injury from insects and smoke. There is a certain group of trees specimens of which can be safelyselected for street planting, either in city or suburban districts. Thisgroup comprises such trees as the sugar maple, red oak, Europeanlinden, and American elm, the last of which is best adapted to plantingon narrow streets because of its high-headed characteristic of growth.Though it becomes very tall its vase-form enables it to reach abovedwellings that may be not far back from the street and to leave open avista down the street axis. The low, compact-headed types of trees,such as the sugar maple, pin oak, and the linden ought to be plantedonly on wide streets. While the use on narrow streets of suchvase-shaped trees as the elm allows for an unobstructed vista, the useof such trees as the pin oak and linden, unless the lower branches areseverely pruned, has a tendency to "choke up" and to obstruct thevista. |
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