24 BULLETIN 816, V. S. DEPAETMEIirT OF AGEICULTURE. 



It is a large, handsome tree with good foliage and is more compact 

 in growth than the American elm. It succeeds well in regions 1, 2, 

 3, and 4. 



The wahoo, or winged elm, ^ is native 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 it 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 development. 



The blue gum ^ is one of the best eucalypti and the one most com- 

 monly used in California. It is taU, globular headed, handsome, and 

 wiU 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 eucal}^ti 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 Vlmus alata Michx. * Eucalyptus viminalis Labill. 



2 Eucalyptus globulus Labill. s Eucalyptus longirostris F. Muell. 



3 Eucalyptus rudis Endl. 



