Eucalyptus(Eucalyptus globulus) is a tall evergreen tree native to Australia and Tasmania. The Leaves and oil of the eucalyptus plant are used for medicinal purposes. Eucalyptus oil consists of the volatile oil distilled from fresh leaves and branch tops of the eucalyptus plant.
Topical ointment containing eucalyptus oil have been used in traditional Aboliginal medicines to heal wounds and fungal infections. Teas containing eucalyptus leaves were also used to reduce fevers. The therapeutic uses of eucalyptus soon spread to other traditional medicine systems, including Chinese ,Indian(Ayurvedic),and Greco-European.
 Plant Description
There are many species of eucalyptus. Some of them are the size of an ornamental shrub ,and some grow to be giant trees. The type of eucalyptus that is most often used medicinally is called blue gum or leaves are dark green and shiny. Its blue-grey bark peels to reveal a cream-colored inner bark.
 What is made of?
Eucalyptus leaves contain tannins (Which are believed to help reduce inflammation), flavonoids (such as quercetin , which has antioxidant properties),and volatile oils.
Eucalyptus oil is a rich source of the antiseptic substance cineole( sometimes referred to as eucalyptol).