Respiratory System: Asthma, bronchitis, chills, colic, coughs, laryngitis.
Immune System: ’Flu.
Nervous System: Nervous tension and stress-related complaints. It warms and tones the heart and circulation, both physically and metaphorically: ‘This essence creates a kind of euphoria; it interposes a padded zone between us and events.’11
OTHER USES Compound benzoin tincture is used in pharmaceuticals and in dentistry to treat gum inflammation. The resinoid and absolute are used extensively as fixatives and fragrance components in soaps, cosmetics, toiletries and perfumes, especially Siam benzoin. Both types are used in most food categories, including alcoholic and soft drinks.
Citrus bergamia
FAMILY Rutaceae
SYNONYM Citrus aurantium subsp. bergamia.
GENERAL DESCRIPTION A small tree, about 4.5 metres high with smooth oval leaves, bearing small round fruit which ripen from green to yellow, much like a miniature orange in appearance.
DISTRIBUTION Native to tropical Asia. Extensively cultivated in Calabria in southern Italy and also grown commercially on the Ivory Coast.
OTHER SPECIES Not to be confused with the herb bergamot or bee balm (Monarda didyma).
HERBAL/FOLK TRADITION Named after the Italian city of Bergamo in Lombardy, where the oil was first sold. The oil has been used in Italian folk medicine for many years, primarily for fever (including malaria) and worms; it does not feature in the folk tradition of any other countries. However, due to recent research in Italy, bergamot oil is now known to have a wide spectrum of applications, being particularly useful for mouth, skin, respiratory and urinary tract infections.
ACTIONS Analgesic, anthelmintic, antidepressant, antiseptic (pulmonary, genito-urinary), antispasmodic, antitoxic, carminative, digestive, diuretic, deodorant, febrifuge, laxative, parasiticide, rubefacient, stimulant, stomachic, tonic, vermifuge, vulnerary.
EXTRACTION Essential oil by cold expression of the peel of the nearly ripe fruit. (A rectified or terpeneless oil is produced by vacuum distillation or solvent extraction.)
CHARACTERISTICS A light greenish-yellow liquid with a fresh sweet-fruity, slightly spicy-balsamic undertone. On ageing it turns a brownish-olive colour. It blends well with lavender, neroli, jasmine, cypress, geranium, lemon, chamomile, juniper, coriander and violet.
PRINCIPAL CONSTTTUENTS Known to have about 300 compounds present in the expressed oil: mainly linalyl acetate (30–60 per cent), linalol (11–22 per cent) and other alcohols, sesquiterpenes, terpenes, alkanes and furocoumarins (including bergapten, 0.30–0.39 per cent).
SAFETY DATA Certain furocoumarins, notably bergapten, have been found to be phototoxic on human skin; that is, they cause sensitization and skin pigmentation when exposed to direct sunlight (in concentration and in dilution even after some time!). Extreme care must be taken when using the oil in dermal applications – otherwise a rectified or ‘bergapten-free’ oil should be substituted. Available information indicates it to be otherwise non-toxic and relatively non-irritant.
AROMATHERAPY/HOME USE
Skin Care: Acne, boils, cold sores, eczema, insect repellent and insect bites, oily complexion, psoriasis, scabies, spots, varicose ulcers, wounds.
Respiratory System: Halitosis, mouth infections, sore throat, tonsillitis.
Digestive System: Flatulence, loss of appetite.
Genito-URINARY SYSTEM: Cystitis, leucorrhoea, pruritis, thrush.
Immune System: Colds, fever, ’flu, infectious diseases.
Nervous System: Anxiety, depression and stress-related conditions, having a refreshing and uplifting quality.
OTHER USES Extensively used as a fragrance and, to a degree, a fixative in cosmetics, toiletries, suntan lotions and perfumes – it is a classic ingredient of eau-de-cologne. Widely used in most major food categories and beverages, notably Earl Grey tea.
Betula lenta
FAMILY Betulaceae
SYNONYMS B. capinefolia, cherry birch, southern birch, mahogany birch, mountain mahogany.
GENERAL DESCRIPTION A graceful tree about 25 metres high which has a pyramidal shape while young. It has bright green leaves and a dark reddish-brown aromatic bark, which is broken into plates or patches.
DISTRIBUTION Native to southern Canada and southeastern USA; produced mainly in Pennsylvania.
OTHER SPECIES There are numerous species of birch, spanning several continents, such as black birch (B. nigra) found in North America. Not to be confused with the European white birch (B. alba), which produces birch tar oil used in chronic skin diseases.
HERBAL/FOLK TRADITION The cambium (the layer directly under the bark) is eaten in the spring, cut into strips like vermicelli. The bark, in the form of an infusion, is used as a general stimulant and to promote sweating. As a decoction or syrup, it is used as a tonic for dysentery and is said to be useful in genito-urinary irritation. The flavour of wintergreen and birch bark, in the form of a tea, was popular with the American Indians and European settlers. More recently, this has been translated into a preference for ‘root beer’ flavourings.
ACTIONS Analgesic, anti-inflammatory, antipyretic, antirheumatic, antiseptic, astringent, depurative, diuretic, rubefacient, tonic.
EXTRACTION Essential oil by steam distillation of the bark macerated in warm water.
CHARACTERISTICS Colourless, pale yellow or reddish tinted liquid with an intense, sweet-woody, wintergreen-like scent.
PRINCIPAL CONSTITUENTS Almost entirely methyl salicylate (98 per cent), produced during the maceration process. It is almost identical in composition to wintergreen oil.
SAFETY DATA Methyl salicylate, the major constituent, is not exactly toxic but very harmful in concentration.’ It can be absorbed through the skin, and fatal poisoning via this route has been reported.’12’ It is also classed as an enviromental hazard or marine pollutant.
AROMATHERAPY/HOME USE None.
OTHER USES Limited use as a counter-irritant in anti-arthritic and antineuralgic ointments and analgesic balms. Limited use as a fragrance component in cosmetics and perfumes; extensively used as a flavouring agent, especially
