FAMILY: Myrtaceae
SYNONYMS: Broad-leaf peppermint, blue peppermint, menthol-scented gum.
GENERAL DESCRIPTION: A robust, medium-sized eucalyptus tree, with a short trunk, spreading branches and fibrous grey bark. The young leaves are blue and heart-shaped, the mature leaves are very aromatic, thick and tapering at both ends.
DISTRIBUTION: Native to Tasmania and Australia, especially New South Wales and Victoria. Oil is also produced in South Africa.
OTHER SPECIES: There are two types of broad-leaved peppermint although they look identical – one is rich in cineol (E. dives var. C.) and one is rich in ‘piperitone’ (E. dives var. Type). It is also similar to the peppermint eucalyptus (E. piperita) and the grey or narrow-leaved peppermint (E. radiata var. phellandra). See also entry on Eucalyptus, blue gum and Botanical Classification section.
HERBAL/FOLK TRADITION: The aborigines used the burning leaves in the form of a fumigation for the relief of fever; ‘heat went out of sick man and into fire’.
ACTIONS: See Eucalyptus, blue gum.
EXTRACTION: Essential oil by steam distillation from the leaves and twigs.
CHARACTERISTICS: A colourless or pale yellow mobile liquid with a fresh, camphoraceous, spicy-minty odour.
PRINCIPAL CONSTITUENTS: Piperitone (40–50 per cent), phellandrene (20–30 per cent), camphene, cymene, terpinene and thujene, among others. It is sold as Grades A, B or C according to the exact balance of constituents.
SAFETY DATA: Non-toxic, non-irritant (in dilution), non-sensitizing. Eucalyptus oil is toxic if taken internally (see entry on eucalyptus blue gum).
AROMATHERAPY/HOME: USE
Skin Care: Cuts, sores, ulcers etc.
Circulation muscles and joints: Arthritis, muscular aches and pains, rheumatism, sports injuries, sprains, etc.
Respiratory System: Asthma, bronchitis, catarrh, coughs, throat and mouth infections, etc.
Immune System: Colds, fevers, ’flu, infectious illness, e.g. measles.
Nervous System: Headaches, nervous exhaustion, neuralgia, sciatica.
OTHER USES: Little used medicinally these days except in deodorants, disinfectants, mouthwashes, gargles and in veterinary practice. ‘Piperitone’ rich oils are used in solvents. Employed for the manufacture of thymol and menthol (from piperitone).
EUCALYPTUS,