SELECTION OF TREES FOR PLANTING 57 
although its vigor enables it to adapt itself to less favor¬ 
able conditions. It is difficult to transplant near the 
limits of its successful cultivation. In regions where the 
ground freezes in the winter it would best be moved only 
in very early spring. Its roots are particularly tender 
and susceptible to drying out, like Magnolias and the 
Tulip tree. Where practicable, it may be moved with a 
ball of earth; but as it does especially well on light soils 
near the coast, this is fre¬ 
quently impracticable and 
unnecessary. 
White Ash. —Though not 
so much used as some other 
trees, the White Ash has fine 
possibilities as a street shade 
tree. Its comparatively light 
foliage makes it especially 
desirable for streets, as the 
open crown permits the pas¬ 
sage of sunlight and free circulation of air. The tree de¬ 
velops a round, graceful top and it grows fairly rapidly. 
Rich soil and moisture are required, but under favorable 
conditions it is thrifty and hardy. It is rather subject to 
attacks of oyster shell scale 
and leopard moth. The chief 
drawback is its short sea¬ 
son of foliage, being similar 
to the American Elm in 
this respect. 
Green Ash. —Though of 
smaller growth than the 
White Ash, the Green Ash is 
much used in western cities 
and has a distinct place in 
