Australian natural plant essential oils for aromatherapy and cosmetic applications. Australia has a wide range of aromatic plants, which have been used for thousands of years for their healing properties as part of the Aboriginal pharmacopaeia. While the virtues of Australian Eucalyptus (Eucalyptus radiata) and Tea-tree (Melaleuca alternifolia) are well known and appreciated world-wide, other Australian essential oils offer a brand new world of opportunities with their unique characteristics.