Sometimes known as black or narrow leaved eucalyptus. May be called peppermint eucalyptus. Eucalyptus compose up to 75% of the flora in Australia and was ýdiscoveredý in the late 1700ýs. Since then there have been many names given to these plants and the botanical nomenclature is confusing. This eucalyptus is best suited for long term use to treat chronic respiratory conditions as well as the respiratory system from top to bottom. Radiata is preferred for bacterial infections and as an antiviral. This eucalyptus is the safest and easiest to inhale directly, partly because there is less cough reflex.