Australia is home to more than 700 types of fast-growing, flowering evergreens known as eucalyptus. Part of the myrtle family (Myrtaceae), these plants can grow to 60 feet tall and 15 feet wide. doTERRA has selected five unique species to create its proprietary Eucalyptus: Eucalyptus radiata, Eucalyptus polybractea, Eucalyptus kochii, Eucalyptus loxophleba, and Eucalyptus globulus. - Eucalyptus essential oil creates a calm atmosphere during stressful circumstances - Eucalyptus oil may have cleansing properties due to its main constituent 1,8 cineole - Eucalyptus essential oil provides a cooling sensation, which may contribute to feelings of open airways