Eucalyptus Smithii essential oil, often called Gully Gum, is distilled from the leaves of Eucalyptus smithii, an Australian myrtle tree known for a fresh cineole profile that feels sweeter and softer than globulus. It still reads clearly as eucalyptus, but with a gentler personality.

Traditionally, smithii has been appreciated by blenders who want eucalyptus clarity without the most forceful medicinal edge.

Compared with radiata, smithii can feel cleaner and more straightforward, while still remaining noticeably softer than globulus.