Eucalyptus globulus, the Tasmanian bluegum,southern blue-gum, or blue gum, is an evergreen tree, one of the most widely cultivated trees native to Australia
The leaves are steam distilled to extract eucalyptus oil. E. globulus is the primary source of global eucalyptus oil production, with China being the largest commercial producer. Oil yield ranges from 1.0-2.4% (fresh weight), with cineole being the major isolate. E. globulus oil has established itself internationally because it is virtually phellandrene free, a necessary characteristic for internal pharmaceutical use.In 1870, Cloez identified and ascribed the name “eucalyptol” — now more often called cineole — to the dominant portion of E. globulus oil.