Eucalyptus comes from the myrtle family and boasts of over 660 species of shrubs and trees. They are native to Australia and Tasmania and are referred as gum trees or stringybark in these countries. Eucalyptus is mostly cultivated in temperate and tropical regions of India,  south african collection Americas, Africa, Mediterranean basin, Middle East, and China. Oil is extracted from the leaves of eucalyptus trees using either of the three methods, steam distillation, hydro-distillation or solvent extraction. It is popularly used in over-the-counter drugs to ease cough and congestion. It also provides pain relief and is actively used in ointments and creams for muscle and joint pain. Eucalyptus oil is also used as an insect repellent. Eucalyptus radiata is another variety of eucalyptus tree. The oil extracted from its leaves has almost similar properties to other eucalyptus oils, though with a softer aroma. It has a fresh, camphor like scent with citrus and floral undertones