PRACTICAL ARBORICULTURE 359 
The landowners of the Gulf States as well as Arizona and New Mexico 
should give the Australian Gum tree more attention. The time is rapidly 
approaching when such timber will be of great value, as the Cypress and Yellow 
Pine disappear. Its extremely rapid growth and easy culture make it a very 
desirable economic tree. 
As a shade and ornamental tree it has few equals. Since it is not hardy 
north of Lat. 30 degrees except in California, when it reaches 40 degrees N. Lat., 
it will not be worth while to attempt growing it except in these locations. How- 
ever, there are some varieties mare hardy than others. 
Any trees which grow rapidly, as the Catalpa and Eucalyptus, are gross feed- 
ers and require considerable water for best development, but in many portions 
of the Southwest there are underground streams to which the roots will penetrate 
and obtain necessary moisture. 
Unfortunately as there has been no demand for trees, the nurseries of 
America are not prepared to supply plants of Eucalyptus in large quantities, but 
this will be remedied if planters take sufficient interest in the trees. 
My correspondents in New Zealand, Hawaii and Australia inform me there 
are more than three hundred varieties of the Gum trees in their native woods. 
Some varieties have great durability, being used for foundations of mills partly 
in water. but as a rule the wood is not durable when exposed to alternations of 
moisture and dryness, and in contact with the earth. 
One hundred and fifty varieties have been cultivated in California. 
