24 BULLETIN 816, U. S. DEPARTMENT OF AGRICULTURE. 
It is a large, handsome tree with good foliageand is more compact 
in growth than the American elm. It succeeds well in regions 1, 2, 
33. nd A. 
The wahoo, or winged elm,! is aiies to the South Atlantic and 
Gulf States near the ocean. It has larger leaves than the American 
elm and is not as spreading in its growth, but it succeeds well on city 
streets in regions 11, 12, and 13. 
EUCALYPTUS. 
There are a large number of species of Eucalyptus, many of which 
can be used for street planting in regions 2, 3, and 5. Some cities 
prohibit their planting because their roots are liable to penetrate 
defective sewers, and in other cities they must be kept at least 70 feet 
from a sewer, though even this distance may not prove permanently 
effective. ; 
The roots of any tree are liable to find their way into a defective 
sewer, but the trees mentioned are especially noticeable because of 
their vigorous root growth. It may be questioned whether a tree 
should be condemned for this growth, as 1t may be better to have a 
defective sewer thus revealed than to continue a menace to public 
health. 
Eucalypti are also being planted in southern Florida, but on ac- 
count of the moist climate there it is not to be expected that they will 
succeed as well as in the other regions mentioned. They are tall, 
handsome, quick-growing trees, usually bearing two kinds of leaves 
at some time in their felepenens 
The blue gum? is one of the best eucalypti and the one most com-: 
monly used in California. It is tall, globular headed, handsome, and 
will survive several degrees of frost, but it will not withstand the heat 
of the deserts in region 5. Its roots are especially liable to invade 
sewers. 
The desert gum * is one of the trees most resistant to heat and cold, 
and it makes a handsome avenue tree. It has pendent branches that 
have a tendency to severe splitting with age, but with early attention 
this may be overcome largely. It may prove especially valuable 
for region 5. 
The manna gum‘ is another Eucalyptus which withstands several 
degrees of frost and makes an excellent roadside tree. Some forms 
shed their bark in long bands that leave the trunks almost white. 
Many people consider it a dirty tree on this account. 
The red gum ® grows with a broad head, is one of the most resistant 
of the eucalypti to frost, drought, and heat, and succeeds wherever 
any of these trees can be grown in regions 2, 3, or 5, but is most 
useful in region 5. 
1 Ulmus alata Michx. 4 Eucalyptus viminalis Labill. 
2 Eucalyptus globulus Labill. 5 Eucalyptus longirosiris F. Muell. 
3 Fucalyptus rudis Endl. 
