84 EUCALYPTS CULTIVATED IN THE UNITED STATES. 



GROUPING OF SPECIES ACCORDING TO CHARACTERISTICS, 

 CLIMATIC ADAPTATIONS, AND USES. 



For convenience of reference, the species discussed in the preced- 

 ing- section are here grouped according to some prominent character- 

 istic, climatic requirement, or use. It is hoped that this grouping- 

 will be helpful in determining the name of a tree in cases of ignorance 

 or doubt, and will aid planters in deciding what species to plant in a 

 particular locality, or for any special use. In selecting a species for 

 a particular purpose, it will, of course, be necessary to take into con- 

 sideration as well what species would be likely to thrive in the locality 

 where the planting is to be done. 



CHARACTERISTICS. 

 BARK. 



Bark commonly smooth ("Gum trees"): Eucalyptus citriodora, E. 

 coriacea, E. corynocalyx, E. rostrata, K. saligna, and E. tereticomis. 



Besides the above, some individuals of several species have smooth 

 bark, even when well grown; and it is to be remembered that the seed- 

 lings of all species have smooth bark, and that on some species the 

 bark remains smooth several years longer than on others. 



Some forms of E. amygdalina, E. occidentalism and E. viminalish&ve 

 quite smooth bark; and the bark of E. botry aides and E. rudis remains 

 smooth until the trees are several years old. 



Bark distinctly fibrous ("Stringy barks"): Eucalyptus eugenic- ides, 

 E. macrorhyncha, E. obliquu, and E. piperita. The bark of the fore- 

 going resembles quite closely that of American cedars. 



Bark scaly and furrowed ("Box trees"): Eucalyptus calqphyUa, E. 

 cornuta, E. corymbosa, E. goniocal/yx, E. gomphocephala, E. hemiphloia, 

 E. longijblia, K. microtheca, E. polyanthema, E. populi folia, and E. 

 ■stuartiana. The bark of those designated as "Box trees" resembles 

 considerabby that of American ashes or maples. Besides this similarity 

 of bark, most of the trees known by the above name in Australia have 

 close wood of interlocked fibers. 



Bark hard and deeply fissured ("Iron barks"): Eucalyptus crebra. E. 

 paniculata, E. siderqphloia, and E. sideroxylon. The typical "Iron- 

 bark" of the four is the last species named, the bark of the others 

 being less pronounced as to hardness and unevenness. 



LEAVES. 



Leaves of seedlings opposite and stemless or short stemmed: Euca- 

 lypt/us coriacea, E. eugenioides, E. globulus, E. goniocalyx, E. leu- 

 coxylon, E.macrorhyncha, E. stuartiana, and E. viminalis. Seedlings 

 of the above species are quite marked in appearance, and, though 



