76 TOWN PLANTING 



THE HOP HORNBEAM (Ostrya carpini- 

 folia) has been proved an excellent tree for 

 planting in smoky districts; indeed, for such 

 a purpose it stands almost first on the list. 

 It is a much-branched, round-headed tree, 

 with cordate-ovate, acuminate leaves, and 

 attains to a height of 50 ft. By reason of 

 the resemblance of the female catkins to hops 

 and the leaves to those of the Hornbeam, it 

 has acquired the very descriptive name of the 

 Hop Hornbeam. The flowers are greenish 

 white. 



THE BIRCH, WALNUT, HORNBEAM, and 

 one or two kinds of WILLOW will succeed 

 in the less smoky parts of a town; but they 

 are not to be recommended for planting 

 where the air is constantly impregnated with 

 soot and dust. 



THE MOUNTAIN ASH or ROWAN TREE 

 (Pyrus Aucuparia) has proved itself to be 

 a valuable small-growing tree for planting in 

 urban districts. It is also a tree of great 

 beauty, whether in flower or fruit, one that 

 grows almost anywhere, and with a minimum 



