Native to Australia, flourishing in moist, low lying, swampy areas around Northern New South wales, and Southern Queensland, Tea Tree is a shrub or tree, with green to dark-green coloured ovate or lanceolite shaped leaves, and white to yellow, or greenish to pink or red flowers bundled tightly on central stemens.  The bark is often flakey.  The essential oil is steam distilled from the leaves and terminal twigs and branches, and is clear to pale yellow or yellowy-green tinted in appearance.  Tea tree is highly anti-microbial, anti-fungal, and is an excellent antidote for respiratory conditions, and infections in general.  It stimulates and supports the immune system.  Tea tree eases nervous exhaustion and shock, and is revitalizing, among other qualities.

You will find deeper detail about this essential oil in my books, Essential Oils for Mindfulness and Meditation, and Essential Oils for the Whole Body