PLATE LXIX. 



A TYPICAL IRONBARK. 



(Eucalyptus crebra, F.v.M.) 



A hard, rugged, compact, broadly-latticed pattern, high-ridged bark, either black or grey on the 

 outer surface, and always dark red inside. 



The chief oil constituents of Eucalypts with barks of this character are cineol, pinene and phellandrene. 

 In those of a few, however, phellandrene is absent, while the cineol increases considerably. 

 This group is closely associated chemically with the " Stringybarks " and the " peppermints." 



