644 Town Planting. 



depended upon, even at a sacrifice of variety. Tufted plants, 

 like the Statices, Thrift, Saxifrages, Sedums, Polyanthus, 

 Double-crimson Daisy, Phlox subulata, Candytuft, Pinks, 

 Aubrietia, Arabis albida, and Alyssum saxatile, escape with 

 little injury. Creeping plants, or such as will bear pegging* 

 down, like the hybrid Verbenas, Nierembergia graeilis. Lobelia 

 Erinus, Helianthemum species, various Roses, etc., suggest 

 themselves. Tree Paeonies, Chrysanthemums, Fuchsias, New 

 Zealand Flax, and many other slightly tender things, will 

 succeed well in warm sheltered localities. We might go on 

 enumerating species of different degrees of duration and har- 

 diness ; but, as we have already observed, a very little shelter 

 is sufficient to supply favourable conditions for an almost un- 

 limited number of plants. 



TOWN PLANTING. 



The ensuing remarks apply to the larger towns, where the 

 sooty deposit from the immense volume of smoke daily manu- 

 factured by the numerous fires renders it impossible to grow 

 many plants that would otherwise flourish. There are, of 

 course, other causes beside the smoke tending to destroy vege- 

 tation, or prevent the luxuriant growth we find in the open 

 country, amongst which we may name drought. But as smoke 

 is by far the worst enemy the gardener has to encounter in 

 and around large towns, it will suffice to point out the most 

 suitable subjects for planting in such localities to resist its 

 evil effects. All plants suffer more or less, and, therefore, we 

 have only to choose those which by nature are the least liable 

 to injury. Evidently deciduous trees and shrubs possess an 

 advantage over evergreen species in the total annual renewal 

 of their foliage. Hence it follows that deciduous species 

 should as a rule have the preference. But species with 

 deciduous foliage are not all equally suitable, though this 

 depends perhaps nearly as much on the moisture within reach 

 of their roots, as upon the deleterious effects of an impure at- 

 mosphere. Taking London as an example, it will be seen that 

 certain trees and shrubs grow freely, and for a month or two 

 retain the freshness of spring. The Plane stands first in this 

 category, and being a handsome umbrageous tree should be 

 freely planted. The Common Ash, Poplars, Laburnum, Thorns, 

 several species of Pyrus, Ailanthus glandulosa, and the Elm, 



