Gaultheria procumbens
FAMILY: Ericaceae
SYNONYMS: Aromatic wintergreen, checkerberry, teaberry, gaultheria (oil).
GENERAL DESCRIPTION: A small evergreen herb up to 15 cm high with slender creeping stems shooting forth erect twigs with leathery serrated leaves and drooping white flowers, which are followed by fleshy scarlet berries.
DISTRIBUTION: Native to North America, especially the north eastern region and Canada. The oil is produced in the USA.
OTHER SPECIES: There are several other Gaultheria species which are also used for oil production, sharing similar properties.
HERBAL/FOLK TRADITION: The plant has been used for respiratory conditions such as chronic mucous discharge, but is mainly employed for joint and muscular problems such as lumbago, sciatica, neuralgia, myalgia, etc. The dried leaf and stem are current in the British Herbal Pharmacopoeia as a specific for rheumatoid arthritis.
The essential oil has been used interchangeably with sweet birch oil, both being made up almost exclusively of methyl salicylate.
ACTIONS: Analgesic (mild), anti-inflammatory, antirheumatic, antitussive, astringent, carminative, diuretic, emmenagogue, galactagogue, stimulant.
EXTRACTION: Essential oil by steam (or water) distillation from the leaf, previously macerated in warm water. The essential oil does not occur crudely in the plant, but is only produced during the process of decomposition in warm water.
CHARACTERISTICS: A pale yellow or pinkish liquid with an intense sweet-woody, almost fruity odour. It blends well with oregano, mints, thyme, ylang ylang, narcissus and vanilla.
PRINCIPAL CONSTITUENTS: Almost exclusively methyl salicylate (up to 98 per cent), with formaldehyde and gaultheriline.
SAFETY DATA: Toxic, irritant and sensitizing – an environmental hazard or marine pollutant. The true oil is almost obsolete, having been replaced by synthetic methyl salicylate. See also sweet birch oil.
AROMATHERAPY/HOME: USE None. ‘Avoid both internally and externally.’.
OTHER USES: Some pharmaceutical use, such as ‘Olbas’ oil. Some perfumery applications especially in forest-type fragrances. Extensively used as a flavouring agent in the USA for toothpaste, chewing gum, root beer, Coca-Cola, and other soft drinks.... wintergreen