Pomona College Journal of Economic Botany 



449 



Now, this matter of selection of proper trees for such planting is a most 

 difficult one, even for those of us who never make mistakes, since there are 

 a multitude of things to be considered in our choice of varieties. Nowhere 

 else is a tree put to so many tests of efficiency as when it is to be used for 

 street planting. First of all, such a tree should be tolerably drought resistant 

 because the copious amount of pavement surrounding it is sure to interfere 

 with its water supply. It should be of a natural healthy and sturdy growth, 



Plate 193. Such a planting of mixed Eucalypts in irregular arrangement is \ery natural- 

 istic and effective for the country road. 



unaffected by ordinary insect pests and fungi that attack many of our trees. 

 And it should not be of a rank growing kind that will produce an excess of 

 brittle wood to be torn and broken by the first severe wind to visit the locality. 

 Ideal trees, answering these requirements, are hard to select, but must be found 

 if the question is to be answered satisfactorily. 



But a tree that is perfectly hardy and fitted to survive under such stress 

 of circumstances may not be at all desirable for street planting because of 



