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AFFINITIES. 



1. With E. linearis Delink. 



This is a close relation, at all events as far as herbarium specimens are concerned, 

 but in the field they can usually be sharply separated, since E. linearis is exclusively, 

 or almost exclusively, a smooth-barked tree, while E. amygdalina has a rough butt. The 

 leaves of E. linearis are strikingly linear and graceful; tkose of E. amygdalina are 

 broader and less light and graceful. Both are confined to Tasmania. 



2. With E. radiata Sieber. 



Of the three species, E. amygdalina, radiata and numerosa, E. radiata is the 

 bulkiest species, with the broadest head, and with the trunk of greatest diameter. The 

 foliage in the mass gives the species a dark or blackish appearance, which is enhanced 

 with the greater proportion of rough, blackish bark, greater even than appears to be 

 the case in E. amygdalina, which in Tasmania is hence known as " Black Peppermint." 

 All three species exhale the perfume of Eucalyptus oil, particularly in misty weather. 



The hemispherical operculum in E. amygdalina is marked. 



3. With E. numerosa Maiden. 



Amongst the three species, E. amygdalina, radiata and numerosa, E. numerosa 

 stands out as a small to tall tree, a comparatively slender, graceful species, with long, 

 smooth tops, from which hang long, tough ribbons, which earn for it the name of " Ribbon 

 Gum." The branches are markedly pendulous, and the foliage in the mass is lighter 

 and the individuaHeaves narrower. The flowers are so abundant, replaced subsequently 

 by dense heads of fruits, as to be recorded in the specific name. 



The ribbony bark is the toughest of all three species, but the relative characters 

 of the three timbers require to be worked out. 



