. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. ^^^ ^ -2^ J^ 6. Trees for Streets, Avenues and Roadsides. — The number of tree species suitable for street planting is limited by the necessarily heavy restrictions, as to height, spread, sewer-penetration and sidewalk-raising, imposed by municipal street departments. In European. 2562. Weeping elm. type of a g
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. ^^^ ^ -2^ J^ 6. Trees for Streets, Avenues and Roadsides. — The number of tree species suitable for street planting is limited by the necessarily heavy restrictions, as to height, spread, sewer-penetration and sidewalk-raising, imposed by municipal street departments. In European. 2562. Weeping elm. type of a grotesque horticultural variety, Ulmus scabra var. horizontalis. 2563. Cordyline australis. Often called Dracasna Palm. California. cities the first-named objections are overcome by means of frequent and systematic pruning to a uniform stand- ard; where this necessity can be obviated by the selec- tion of trees which naturally keep within the desired bounds, the labor of maintaining them in a sightly con- dition is minimized and the result much more pleasing. For town streets not more than (JO feet in width, it is important to have trees that will not give too much shade and prevent the rapid drying of the roadway after showers, nor be so tall nor wide-spreading as to obstruct the view and shut out sunshine, rendering the adjacent houses darii, cold and damp. On this account trees with narrow or pyramidal outline are in many cases preferable to those with M'ide-spreading habit, and, generally speaking, deciduous trees are more suit- able than evergreen, although at the time of losing their leaves they make more litter. Exception may be made in favor of such evergreen species as certain palms and cordylines, some acacias and a few other species mentioned below. It is not wise to use trees of very rapid growth on town streets; they soon become too large and require frequent trimming, which is usually equivalent to muti- lation, and are likely to interfere with sewers. It cannot
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