28 



EUCALYPTS IX FLORIDA. 

 Table 16. — Eucalyptus siderophloia in Florida. 



Location. 



Age. 



Height. 



Diameter 

 breast- 

 high. ■ 



Average annual 

 growth. 



Diameter 

 Height. breast- 

 high. 



Killed 



back by 



frost. 



Temper- 

 ature. 



Soil. 



i Years. Feet. Inches. 

 Bradentown ... 10 55 13. 7 



Feet. Inches. 

 5.5 1.-4 



EUCALYPTUS TERETICORXIS SMITH (GRAY GL'm). 



Gray gum has been planted at quite a number of places, chiefly, 

 however, along the west coast from St. Petersburg to Estero. and 

 through the central lake region from Tavares to Avon Park. It is 

 also being tried in the Florida East Coast Hallway Co.'s plantation. 



One tree of this species at Avon Park has made the most rapid 

 diameter growth of any eucalyptus measured in Florida, showing in 



9 years a total of 25.5 inches in diameter and 60 feet in height, or an 

 average diameter growth of 2.8 inches. This tree is on sandy soil 



10 or 15 feet deep, with a stiff subsoil, and has withstood tempera- 

 tures of 22° without being injured. It has made the best growth on 

 deep, sandy soils, and young trees have even done well on soils under- 

 laid at no great distance by rock or hardpan. and at St. Petersburg it 

 has not been injured by temperatures of 20°. but this same species at 

 Tampa was frozen back at 19 = F.. although not permanently injured. 



It is not particular as to soil, but prefers warm coast regions, and 

 becomes stunted if grown on exposed, rocky situations. In dry. com- 

 pact soil its development is not satisfactory, but on sandy soil, even 

 though dry. its growth has been quite rapid, as is well demonstrated 

 by the specimen at Avon Park. 



It is one of the most beautiful species, with its pyramidal form and 

 straight bole. In its native habitat it is never found far from the 

 coast, preferring low. humid flats around lakes or water courses, but 

 never on saline situations. There it attains a height of from 100 to 

 160 feet and a diameter of 6.5 feet at the base. The usual rate of 

 growth of this tree is about two-thirds that of blue gum. 



In Provence and Algeria it has grown well on low. marshy tracts 

 where the soil is deep, and in Brazil on inundated soil where E. ros- 

 trata could not be grown successfully. Here some of these trees 

 planted by the Paulista Railway Co. in four years attained a diameter 

 of 7.6 inches and a height of 10 to 50 feet. 



In California it is said to endure minimum temperatures of 15 z to 

 20° and to also withstand drought well. 



