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 commonly smooth (''Gum trees'''): J^uealyj)tys cifriod(im, E. 

 coi'lacea^ E. corynocaly.r^ E. rosirata, E. saligna^ and ^. tereticornis. 



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. viminalis have 

 quite smooth bark; and the bark of E. hotry aides and E. r?«c?/s remains 

 smooth until the trees are several j^ears old. 



Bark distinctl}^ fibrous (" Stringy barks"): Eucaly2)tus eugenioides, 

 E. uiaci'(/rhynch<(, E. ohliqua^ and E. jjijperita. The bark of the fore- 

 going resembles quite closely that of American cedars. 



Bark scalj^ and furrowed ("Box trees"): Eucalyptus calophylla^ E. 

 cornuta^ E. corymhosa^ E. goniocalyx^ E. gom/phocephala^ E. hemi^Jdoia^ 

 E. longifolia^ E. microtheca^ E. j^olyanthema^ E. popidifolia, and E. 

 sttiartiana. The bark of those designated as "Box trees" resembles 

 considerabh" that of American ashes or maples. Besides this similarity 

 of bark, most of the trees known b}^ the above name in Australia have 

 close wood of interlocked libers. 



Bark hard and deeply fissured ("'Ironbarks"): Eitcalyi?tus crebra. E. 

 jjanicidata^ E. sideropJdoiam and E. sideroxylon. The tvpical "Iron- 

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

 being less pronounced as to hardness and unevenness. 



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

 ly2)tiis coriacea, E. eugenioides^ E. glohulus^ E. goniocalyx^ E. leu- 

 cogcylon^ E. macrorhyncha^ E. stuartiana, and E. viminalis. Seedlings 

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



