288 ON TREES AND SHRUBS IN LARGE TOWNS. 



the Pinus austriaca and the Cupressus Lawsoniana, will 

 hardly grow. But the Plane tree does not do well every- 

 where, which, on generalising from a number of isolated 

 facts, would seem to be due either to soil or climate. 

 However this may be, we cannot, in the present state of 

 our knowledge on this subject, do better than trust 

 to observation and experience by planting in each 

 district those trees and plants which we know do well 

 there. 



The least observing cannot fail to have remarked that 

 in smoky districts deciduous trees thrive better than ever- 

 greens. This is probably due to the former dropping their 

 leaves every autumn, and renewing them every spring, 

 which the latter do not ; their leaves remain on the trees, 

 their pores becoming choked with sediment from the 

 air, and healthy action consequently impeded. Deciduous 

 trees and shrubs should, therefore, abound in all town 

 plantations. 



Guided principally by observation and experience over 

 a somewhat extended surface of country and a lengthened 

 period of time, I have ventured to compile the following 

 list of trees and shrubs suitable for plantations in large 

 towns. For the smaller towns with open surroundings 

 this list may be considerably extended. 



DECIDUOUS TREES EXCEEDING 12 FEET IN HEIGHT 

 WHEN FULL GROWN. 



Acer Pseudo-Platanus Betula alba 



purpurea Catalpa syringaefolia 



dasycarpum Carya, of sorts 



macrophyllum Crataegus coccinea, corallina, 



platanoides grandiflora, Paul's new 



Ailantus glandulosus double scarlet, fl. pleno 



Alnus, of sorts (the double pink), stricta, 



Amelanchier Botryapium pentagyna, and almost any 



Amygdalus communis other free grower 



