1844 



TREES 



TREES 



cc. -Evergreen. 

 Susceptible to severe frost (probably 20° Fahr. and 



even less). 

 Cmnamonium Camphora, Grevillea robusta, 



Corynocarpus Itevigatas, Sterculia diversit'olia, 



Cryptocarya Miersii, Tristania conferta. 



dd. Hardy. 

 Acacia melanoxylon, Laurus nobilis, 



Cerasus Lusitanica, Pittosporum erassifolium. 



Ilex Aquifolium, Quercus Suber, 



Lagunaria Patersonii, Unibellularia Californica. 



A. Outline more or less rounded, but trees not as 

 wide-spreading nor as shade-giving as in class 4. 

 B. Deciduous. 

 C. Susceptible to frost (25° Fahr.). 

 Phytolacca dioica. 



cc. Hardy. 



^Esculus glabra, 

 Fraxinus Americana, 

 Fraxinus excelsior, 

 Fraxinus Ornus, 

 Gyninocladus Canadensis, 



Juglans Californica, 

 Juglans nigra, 

 Kielreuteria paniculata, 

 Paulownia imperialis, 



Kobinia Pseudacacia. 



C. Probably susceptible to severe frost (20° Fahr. or 



Acacia cyanophylla, 

 Alectryon exeelsum, 

 Bursaria spinosa. 

 Eucalyptus calophylla. 

 Eucalyptus cornuta. 

 Eucalyptus corymbosa, 

 Eucalyptus corynocalyx 



Eucalyptus fleifolia, 

 Eucalyptus Globulus, 

 Eucalyptus maculata, rar. 



citriodora, 

 Eucalyptus robusta, 

 Hymenosporuui Havuin, 

 Maytenus Boaiia. 



cc. Hardy. 



Acacia pyenantha, 

 Eucalyptus amygdalina. 

 Eucalyptus" Gunnii, 

 Eucalyptus b-ucoxylon, 

 Eucalyptus obliqua. 

 Eucalyptus rostrata, 

 Eucalyptus rmlis, 

 Eucalyptus viiuiualis, 



Jubasa spectabilis, 

 Phoenix Canarieusis, 

 Phoenix reclinata, 

 Phoenix sylvestris, 

 Pittosporum eugenioides, 

 Pittosporum tenuifoHum, 

 Pittosporum undulatum. 



aaaa. Drooping trees. 



B. Deciduous. 

 a, var. Wieri 

 pendula ele- 



pendula la- Qu 



Acer sacchar 



laciniatuni, 

 Betula alba, ' 



gans, 

 Betula alba, 



ciniata, 

 Betula alba, 



Youngi, 

 Crataegus monogyna, var. pen 



dula, 

 Fagus sylvatica.var. pendula. 

 Fraxinus excelsior, var. aurez 



pendula, 

 Fraxinus excelsior, var. peu 



dula. Ulmus 



Juglans regia, var. pendula, dula 



Laburnum vulgare, var. pen- Ulnu 



dulum, Uimi 



bb. JEvergre 



Cupressus funebris, Sch 



Morus alba (Teas' Weeping), 

 Populus grandidentata, var 



pendula, 

 Primus fruticosa.var. pendula 



cus lobata, 

 Salix Babylonica, 

 pendula Salix Babylonica. var. Lickii, 

 Sophora Japonica pendula, 

 Sorbus Aucuparia, var. pen 



dula, 

 Tilia Americana, var. pendula 

 Tilia Europsea, var. pendula, 

 Ulmus Americana, var. pen 



. pen 



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 



3562. Weeping elm. type of a erotesque horticultural variety. 

 Ulmus scabra var. horizontalis. 



2563. CoMyline australis. 

 Often called Draca?na 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 uO 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 dark, cold and damp. On this account 

 trees with narrow or pyramidal outline are in many 

 cases preferable to those with wide -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 be said that street planting in California 

 towns has, in most cases, been satisfactory. In spite of 

 the much larger variety of suitable material than is 

 available in most of the states, there are few examples 

 of good street-planting to be met with. In most of our 

 towns the eye is greeted with a few straggling trees, of 

 which perhaps not more than two are of one kind, re- 

 calling Professor Wangh's apt simile of "nine mon- 

 strously different buttons in a row down the front of a 

 Prince Albert coat." There are many pleasing exceptions, 

 however, although few are entirely satisfactory. The re- 

 peated attempts to improve the appearance of a town by 

 planting trees along the streets should be encouraged on 

 every occasion, and the object of this article is to render 



