454 Pomona College Journal of Economic Botany 



illustrations well shows what a canyon the palm will in time make of a street. 

 Although while young, many of the palms seem very graceful and beautiful, 

 as they age and shed their old leaves leaving nothing but a bare trunk sur- 

 mounted by a tassel high above the ground, they present an appearance that 

 becomes tiring if viewed continuously for miles along a country road. The 

 same fault is to be found with the Italian cypress (Cupressus sempervirens) 

 and the poplar trees tiiat grow perpendicularly into the air with scarcely any 

 lateral l)ranches. So, in a general way, I would discourage the planting of 

 palms and slender types of trees along avenues of any length. 



Plate 198. Olive (Olea europea). Hardy, enduring, graceful and ever ready to do 

 service as a street tree. 



In relation to street and roadside planting in California, much is said 

 in favor of planting evergreens and nothing but evergreens, even though some 

 of our most beautiful shade and avenue trees are deciduous. Especially along 

 the sea coasts, where the winters tend to be damp and foggy, would it seem 

 advisable to plant an occasional street to a deciduous variety that would admit 

 the light and air during the winter months when the roadways and walks are 

 so apt to be damp and di.sagreeable. At the same time, such a tree would 

 afford shade in the summer when it is most needed. Some of our most 

 beautiful shade trees are deciduous and I do not think that it gives our 

 landscape a bleak or desolate appearance to possess an occasional clump or 

 avenue of trees that are without their leaves for a few short months of the 



