Herbs that act on bacteria of communicable diseases and help prevent spread of infection. Camphor, Eucalyptus, Thyme, Terebene, Pennyroyal, Pine. Tinctures or essential oils.
Methods of disinfection (1) Skin, wounds, etc. – chlorhexidine (with detergent or spirit); iodine (with detergent or spirit); cetrimide; ethyl alcohol; all must stay in contact with the skin for long enough for bacteria to be killed. (2) Hard surfaces (?oors, walls, etc.) – hypochlorites (i.e. bleaches) with or without detergent; cetrimide; iodine-containing solutions; ethyl alcohol. (3) Equipment – wet or dry heat (e.g. boiling for more than 5 minutes); submersion in liquid disinfectants for the appropriate time (e.g. glutaraldehyde 2·5 per cent), chlorhexidine in spirit 70 per cent, formaldehyde (irritant), chlorhexidine (0·1 per cent aqueous), hypochlorites.... disinfection
(See also disinfectants; aseptic technique.)... antiseptics
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, ... eucalyptus, broad-leaved peppermint
FAMILY: Lauraceae
SYNONYMS: Laurus camphora, true camphor, hon-sho, laurel camphor, gum camphor, Japanese camphor, Formosa camphor.
GENERAL DESCRIPTION: A tall, handsome, evergreen tree, up to 30 metres high, not unlike the linden. It has many branches bearing clusters of small white flowers followed by red berries. It produces a white crystalline substance, the crude camphor, from the wood of mature trees over fifty years old.
DISTRIBUTION: Native to Japan and Taiwan principally, also China; cultivated in India, Ceylon, Egypt, Madagascar, southern Europe and America.
OTHER SPECIES: There are many species of camphor: the ho-sho variety produces ho leaf and ho wood oil; the Chinese variety produces apopin oil; the Japan and Taiwan type, known as hon-sho or true camphor, produces two chemotypes: camphor-safrol (Japan) and camphor-linalol (Taiwan). All these are to be distinguished from the Borneo camphor or borneol which is of different botanical origin.
HERBAL/FOLK TRADITION: A long-standing traditional preventative of infectious disease; a lump of camphor would be worn around the neck as a protection. In addition it was used for nervous and respiratory diseases in general, and for heart failure! However, in its crude form it is very poisonous in large doses, and has been removed from the British Pharmacopoeia.
ACTIONS: Anti-inflammatory, antiseptic, antiviral, bactericidal, counter-irritant, diuretic, expectorant, stimulant, rubefacient, vermifuge.
EXTRACTION: Crude camphor is collected from the trees in crystalline form. The essential oil is produced by steam distillation from the wood, root stumps and branches and then rectified under vacuum and filter pressed to produce three fractions, known as white, brown and yellow camphor.
CHARACTERISTICS: White camphor is the lightest (lowest boiling) fraction, a colourless to pale yellow liquid with a sharp, pungent camphoraceous odour. Brown camphor is the middle fraction. Yellow camphor, a blue-green or yellowish liquid, is the heaviest.
PRINCIPAL CONSTITUENTS: 1 White camphor contains mainly cineol, with pinene, terpineol, menthol, thymol and no safrol. 2. Brown camphor contains up to 80 per cent safrol and some terpineol. 3. Yellow camphor contains mainly safrol, sesquiterpenes and sesquiterpene alcohols.
SAFETY DATA: Brown and yellow camphor (containing safrol) are toxic and carcinogenic and ‘should not be used in therapy, either internally or externally.’. White camphor does not contain safrol and is relatively non-toxic, non-sensitizing and non-irritant. It is, however, an enviromental hazard or marine pollutant.
AROMATHERAPY/HOME: USE White camphor may be used with care for:
Skin care: Acne, inflammation, oily conditions, spots; also for insect prevention (flies, moths, etc).
Circulation Muscles And Joints: Arthritis, muscular aches and pains, rheumatism, sprains, etc.
Respiratory System: Bronchitis, chills, coughs.
Immune System: Colds, fever, ’flu, infectious disease.
OTHER USES: White and brown camphor are used as the starting material for the isolation of many perfumery chemicals, for example safrol and cineol. White camphor is used as a solvent in the paint and lacquer industry, and for the production of celluloid. Fractions of white oil are used as fragrance and masking agents in detergents, soaps, disinfectants and household products.... camphor
FAMILY: Pinaceae
SYNONYMS: A. pectinata, whitespruce, European silver fir, edeltanne, weisstanne, templin (cone oil), Strassburg or Vosges turpentine (oil), fir needle (oil).
GENERAL DESCRIPTION: A relatively small coniferous tree, with a regular pyramidal shape and a silvery white bark, grown chiefly for timber and as Christmas trees.
DISTRIBUTION: Native to north European mountainous regions; cultivated mainly in Switzerland, Poland, Germany, France, Austria and especially Yugoslavia.
OTHER SPECIES: Oils that are distilled from the twigs and needles of various members of the coniferous families, Abies, Larix, Picea, Pinus, and Tsuga, are all commonly called fir needle oil – it is therefore important to know the specific botanical name. There are many other members of the fir or Abies family, notably the Canadian balsam (A. balsamifera) and the Siberian fir (A. siberica), the most popular fir needle oil in Europe and the USA due to its fine fragrance. Others include the Japanese fir needle oil from A.mayriana or A.sachalinensis. See also entries on spruce, pines and the Botanical Classification section.
HERBAL/FOLK TRADITION: It is highly esteemed on the Continent for its medicinal virtues and its fragrant scent. It is used mainly for respiratory complaints, fever, muscular and rheumatic pain.
ACTIONS: Analgesic, antiseptic (pulmonary), antitussive, deodorant, expectorant, rubefacient, stimulant, tonic.
EXTRACTION: Essential oil by steam distillation from the 1. needles and young twigs, and 2. fir cones, broken up pieces (templin oil)
CHARACTERISTICS: 1. A colourless or pale yellow liquid of pleasing, rich, sweet-balsamic odour. 2. Similar to the needle oil, but with a more orange-like fragrance. It blends well with galbanum, labdanum, lavender, rosemary, lemon, pine and marjoram.
PRINCIPAL CONSTITUENTS: 1. Santene, pinene, limonene, bornyl acetate, lauraldehyde among others. 2. Pinene, limonene, borneol, bornyl acetate, among others.
SAFETY DATA: Non-toxic, non-irritant (except in high concentration), non-sensitizing.
AROMATHERAPY/HOME: USE
Circulation Muscles And Joints: Arthritis, muscular aches and pains, rheumatism.
Respiratory System: Bronchitis, coughs, sinusitis, etc.
Immune System: Colds, fever, ’flu.
OTHER USES: Employed as an ingredient in some cough and cold remedies and rheumatic treatments. Used as a fragrance component in deodorants, room sprays, disinfectants, bath preparations, soaps and perfumes.... fir needle, silver
FAMILY: Lamiaceae (Labiatae)
SYNONYMS: L. spica, aspic, broad-leaved lavender, lesser lavender, spike.
GENERAL DESCRIPTION: An aromatic evergreen sub-shrub up to 1 metre high with lance-shaped leaves, broader and rougher than true lavender. The flower is more compressed and of a dull grey-blue colour.
DISTRIBUTION: Native to the mountainous regions of France and Spain; also found in North Africa, Italy, Yugoslavia and the eastern Mediterranean countries. It is cultivated internationally; the oil is mainly produced in France and Spain.
OTHER SPECIES: There are many different chemotypes of lavender in general, and this also applies to spike lavender. The French spike oil is reputed to be a more delicate, aromatic scent than the Spanish variety. For other varieties, see entries on lavandin, true lavender and the Botanical Classification section.
HERBAL/FOLK TRADITION: Culpeper recommends spike lavender for a variety of ailments including ‘pains of the head and brain which proceed from cold, apoplexy, falling sickness, the dropsy, or sluggish malady, cramps, convulsions, palsies, and often faintings’. He also warns that ‘the oil of spike is of a fierce and piercing quality, and ought to be carefully used, a very few drops being sufficient for inward or outward maladies’.. The preparation ‘oleum spicae’ was made by mixing ¼ spike oil with ¾ turpentine, and used for paralysed limbs, old sprains and stiff joints (it was also said to encourage hair growth).
Spike lavender is current in the British Herbal Pharmacopoeia, indicated for flatulent dyspepsia, colic, depressive headaches, and the oil (topically) for rheumatic pain.
ACTIONS: See true lavender.
EXTRACTION: Essential oil by water or steam distillation from the flowering tops.
CHARACTERISTICS: A water-white or pale yellow liquid with a penetrating, fresh herbaceous, camphoraceous odour. It blends well with rosemary, sage, lavandin, eucalyptus, rosewood, lavender, petitgrain, pine, cedarwood, oakmoss, patchouli and spice oils, particularly clove.
PRINCIPAL CONSTITUENTS: Mainly cineol and camphor (40–60 per cent), with linalol and linalyl acetate, among others.
SAFETY DATA: Non-toxic, non-irritant (except in concentration), non-sensitizing.
AROMATHERAPY/HOME: USE See true lavender.
OTHER USES: It is used in some pharmaceutical preparations and especially in veterinary practice as a prophylactic, in incipient paralysis, for rheumatism and arthritis and to get rid of lice. It is extensively employed as a fragrance component especially in soaps and industrial perfumes such as deodorants, disinfectants and cleaning agents, as well as insecticides and room sprays, etc. It is also used in the food industry and in the production of fine varnishes and lacquers.... lavender, spike
FAMILY: Pinaceae
SYNONYMS: Longleaf yellow pine, southern yellow pine, pitch pine, pine (oil).
GENERAL DESCRIPTION: A tall evergreen tree with long needles and a straight trunk, grown extensively for its timber. It exudes a natural oleoresin from the trunk, which provides the largest source for the production of turpentine in America – see also entry on turpentine.
DISTRIBUTION: Native to south eastern USA, where the oil is largely produced.
OTHER SPECIES: There are numerous other species of pine all over the world which are used to produce pine oil, as well as pine needle and turpentine oil – see Botanical Classification section.
HERBAL/FOLK TRADITION: Pine sawdust has been used for centuries as a highly esteemed household remedy for a variety of ailments. ‘It is a grand, gentle, although powerful external antiseptic remedy, applied as a poultice in rheumatism when localised, hard cancerous tumours, tuberculosis in the knee or ankle joints, disease of the bone, in short, all sluggish morbid deposits ... I have used it behind the head for failing sight, down the spine for general debility, on the loins for lumbago, etc. all with the best results.’.
ACTIONS: Analgesic (mild), antirheumatic, antiseptic, bactericidal, expectorant, insecticidal, stimulant.
EXTRACTION: The crude oil is obtained by steam distillation from the sawdust and wood chips from the heartwood and roots of the tree (wastage from the timber mills), and then submitted to fractional distillation under atmospheric pressure to produce pine essential oil.
CHARACTERISTICS: A water-white or pale yellow liquid with a sweet-balsamic, pinewood scent. It blends well with rosemary, pine needle, cedarwood, citronella, rosewood, ho leaf and oakmoss.
PRINCIPAL CONSTITUENTS: Terpineol, estragole, fenchone, fenchyl alcohol and borneol, among others.
SAFETY DATA: Non-toxic; non-irritant (except in concentration); possible sensitization in some individuals.
AROMATHERAPY/HOME: USE
Circulation muscles and joints: Arthritis, debility, lumbago, muscular aches and pains, poor circulation, rheumatism, stiffness, etc.
Respiratory system: Asthma, bronchitis, catarrh, sinusitis.
OTHER USES: Used extensively in medicine, particularly in veterinary antiseptic sprays, disinfectants, detergents and insecticides (as a solvent carrier). Employed as a fragrance component in soaps, toiletries, bath products and perfumes. Also used in paint manufacture although it is increasingly being replaced by synthetic ‘pine oil’.... pine, longleaf
FAMILY: Myrtaceae
SYNONYMS: Narrow-leaved paperbark tea tree, ti-tree, ti-trol, melasol.
GENERAL DESCRIPTION: A small tree or shrub (smallest of the tea tree family), with needle-like leaves similar to cypress, with heads of sessile yellow or purplish flowers.
DISTRIBUTION: Native to Australia. Other varieties have been cultivated elsewhere, but M. alternifolia is not produced outside Australia, mainly in New South Wales.
OTHER SPECIES: Tea tree is a general name for members of the Melaleuca family which exists in many physiological forms including cajeput (M. cajeputi) and niaouli (M. viridiflora), and many others such as M. bracteata and M. linariifolia – see Botanical Classification section.
HERBAL/FOLK TRADITION: The name derives from its local usage as a type of herbal tea, prepared from the leaves. Our present knowledge of the properties and uses of tea tree is based on a very long history of use by the aboriginal people of Australia. It has been extensively researched recently by scientific methods with the following results: ‘1. This oil is unusual in that it is active against all three varieties of infectious organisms: bacteria, fungi and viruses. 2. It is a very powerful immuno-stimulant, so when the body is threatened by any of these organisms ti-tree increases its ability to respond.’ .
ACTIONS: Anti-infectious, anti-inflammatory, antiseptic, antiviral, bactericidal, balsamic, cicatrisant, diaphoretic, expectorant, fungicidal, immuno-stimulant, parasiticide, vulnerary.
EXTRACTION: Essential oil by steam or water distillation from the leaves and twigs.
CHARACTERISTICS: A pale yellowy-green or water-white mobile liquid with a warm, fresh, spicy-camphoraceous odour. It blends well with lavandin, lavender, clary sage, rosemary, oakmoss, pine, cananga, geranium, marjoram, and spice oils, especially clove and nutmeg.
PRINCIPAL CONSTITUENTS: Terpinene-4-ol (up to 30 per cent), cineol, pinene, terpinenes, cymene, sesquiterpenes, sesquiterpene alcohols, among others.
SAFETY DATA: Non-toxic, non-irritant, possible sensitization in some individuals.
AROMATHERAPY/HOME: USE
Skin care: Abscess, acne, athlete’s foot, blisters, burns, cold sores, dandruff, herpes, insect bites, oily skin, rashes (nappy rash), spots, verrucae, warts, wounds (infected).
Respiratory system: Asthma, bronchitis, catarrh, coughs, sinusitis, tuberculosis, whooping cough.
Genito-urinary system: Thrush, vaginitis, cystitis, pruritis.
Immune system: Colds, fever, ’flu, infectious illnesses such as chickenpox.
OTHER USES: Employed in soaps, toothpastes, deodorants, disinfectants, gargles, germicides and, increasingly, in aftershaves and spicy colognes.... tea tree
FAMILY: Cupressaceae
SYNONYMS: Swamp cedar, white cedar, northern white cedar, eastern white cedar, tree of life, American arborvitae, cedarleaf (oil).
GENERAL DESCRIPTION: A graceful pyramid-shaped coniferous tree up to 20 metres high with scale-like leaves and broadly-winged seeds, sometimes planted as hedging. The tree must be at least fifteen years old before it is ready to be used for essential oil production.
DISTRIBUTION: Native to north eastern North America; cultivated in France. The oil is produced mainly in Canada and the USA, similar oils are also produced in the East – see here.
OTHER SPECIES: There are many forms and cultivated varieties of this tree: the western red cedar or Washington cedar (T. plicata); the Chinese or Japanese cedar (T. orientalis or Biota orientalis); the North African variety (T. articulata) which yields a resin known as ‘sanderac’.
The hiba tree (Thujopsis dolobrata) is used to produce hiba wood oil and hiba leaf oil in Japan. Hiba wood oil, according to available data, is non-toxic, non-irritant and non-sensitizing (unlike the other thuja oils), and has excellent resistance to fungi and bacteria due to the ketonic substances found in the oil. It is used extensively in Japan as an industrial perfume.
HERBAL/FOLK TRADITION: Used as an incense by ancient civilizations for ritual purposes. A decoction of leaves has been used for coughs, fever, intestinal parasites, cystitis and venereal diseases. The ointment has been used for rheumatism, gout, warts, verrucae, psoriasis and other ailments.
The twigs are current in the British Herbal Pharmacopoeia, used specifically for bronchitis with cardiac weakness, and warts.
ACTIONS: Antirheumatic, astringent, diuretic, emmenagogue, expectorant, insect repellent, rubefacient, stimulant (nerve, uterus and heart muscles), tonic, vermifuge.
EXTRACTION: Essential oil by steam distillation from the fresh leaves, twigs and bark.
CHARACTERISTICS: A colourless to pale yellowy-green liquid with a sharp, fresh, camphoraceous odour.
PRINCIPAL CONSTITUENTS: Thujone (approx. 60 per cent), fenchone, camphor, sabinene and pinene, among others.
SAFETY DATA: Oral toxin – poisonous due to high thujone content. Abortifacient.
AROMATHERAPY/HOME: USE None. ‘Should not be used in aromatherapy either internally or externally.’.
OTHER USES: Used in pharmaceutical products such as disinfectants and sprays; also as a counter-irritant in analgesic ointments and liniments. A fragrance component in some toiletries and perfumes. Employed as a flavour ingredient in most major food categories (provided that the finished food is recognized thujone-free).... thuja
FAMILY: Lamiaceae (Labiatae)
SYNONYMS: T. aestivus, T. ilerdensis, T. webbianus, T. valentianus, French thyme, garden thyme, red thyme (oil), white thyme (oil).
GENERAL DESCRIPTION: A perennial evergreen subshrub up to 45 cms high with a woody root and much-branched upright stem. It has small, grey-green, oval, aromatic leaves and pale purple or white flowers.
DISTRIBUTION: Native to Spain and the Mediterranean region; now found throughout Asia Minor, Algeria, Turkey, Tunisia, Israel, the USA, Russia, China and central Europe. The oil is mainly produced in Spain but also in France, Israel, Greece, Morocco, Algeria, Germany and the USA.
OTHER SPECIES: There are numerous varieties of thyme – the common thyme is believed to have derived from the wild thyme or mother-of-thyme (T. serpyllum), which is also used to produce an essential oil called serpolet, similar in effect to the common thyme oil.
Another species used for the production of the so-called red thyme oil is particularly the Spanish sauce thyme (T. zygis), a highly penetrating oil good for cellulitis, sports injuries, etc. (although, like the common thyme, it is a skin irritant). Other species used for essential oil production include lemon thyme (T. citriodorus), a fresh scented oil good for asthma and other respiratory conditions, safe for children. Spanish marjoram (T. Mastichina) is actually botanically classified as a variety of thyme, with which it shares many common properties, despite its common name. Spanish marjoram contains mainly 1,8-cineole (up to 75 per cent) and linalool (up to 20 per cent), so therapeutically has much in common with eucalyptus, being well suited to treating viral and bacterial respiratory infections. See also Botanical Classification section.
HERBAL/FOLK TRADITION: One of the earliest medicinal plants employed throughout the Mediterranean region, well known to both Hippocrates and Dioscorides. It was used by the ancient Egyptians in the embalming process, and by the ancient Greeks to fumigate against infectious illness; the name derives from the Greek thymos meaning ‘to perfume’. It is also a long-established culinary herb, especially used for the preservation of meat.
It has a wide range of uses, though in Western herbal medicine its main areas of application are respiratory problems, digestive complaints and the prevention and treatment of infection. In the British Herbal Pharmacopoeia it is indicated for dyspepsia, chronic gastritis, bronchitis, pertussis, asthma, children’s diarrhoea, laryngitis, tonsillitis and enuresis in children.
ACTIONS: Anthelmintic, antimicrobial, antioxidant, antiputrescent, antirheumatic, antiseptic (intestinal, pulmonary, genito-urinary), antispasmodic, antitussive, antitoxic, aperitif, astringent, aphrodisiac, bactericidal, balsamic, carminative, cicatrisant, diuretic, emmenagogue, expectorant, fungicidal, hypertensive, nervine, revulsive, rubefacient, parasiticide, stimulant (immune system, circulation), sudorific, tonic, vermifuge.
EXTRACTION: Essential oil by water or steam distillation from the fresh or partially dried leaves and flowering tops. 1. ‘Red thyme oil’ is the crude distillate. 2. ‘White thyme oil’ is produced by further redistillation or rectification. (An absolute is also produced in France by solvent extraction for perfumery use.)
CHARACTERISTICS: 1. A red, brown or orange liquid with a warm, spicy-herbaceous, powerful odour. 2. A clear, pale yellow liquid with a sweet, green-fresh, milder scent. It blends well with bergamot, lemon, rosemary, melissa, lavender, lavandin, marjoram, Peru balsam, pine, etc.
PRINCIPAL CONSTITUENTS: Thymol and carvacrol (up to 60 per cent), cymene, terpinene, camphene, borneol, linalol; depending on the source it can also contain geraniol, citral and thuyanol, etc.
There are many chemotypes of thyme oil: notably the ‘thymol’ and ‘carvacrol’ types (warming and active); the ‘thuyanol’ type (penetrating and antiviral); and the milder ‘linalol’ or ‘citral’ types (sweet-scented, non-irritant).
SAFETY DATA: Red thyme oil, serpolet (from wild thyme), ‘thymol’ and ‘carvacrol’ type oils all contain quite large amounts of toxic phenols (carvacrol and thymol). They can irritate mucous membranes, cause dermal irritation and may cause sensitization in some individuals. Use in moderation, in low dilution only. They are best avoided during pregnancy.
White thyme is not a ‘complete’ oil and is often adulterated. Lemon thyme and ‘linalol’types are in general less toxic, non-irritant, with less possibility of sensitization – safe for use on the skin and with children.
AROMATHERAPY/HOME: USE
Skin care: Abscess, acne, bruises, burns, cuts, dermatitis, eczema, insect bites, lice, gum infections, oily skin, scabies.
Circulation muscles and joints: Arthritis, cellulitis, gout, muscular aches and pains, obesity, oedema, poor circulation, rheumatism, sprains, sports injuries.
Respiratory system: Asthma, bronchitis, catarrh, coughs, laryngitis, sinusitis, sore throat, tonsillitis.
Digestive system: Diarrhoea, dyspepsia, flatulence.
Genito-urinary system: Cystitis, urethritis.
Immune system: Chills, colds, ’flu, infectious diseases.
Nervous system: Headaches, insomnia, nervous debility and stress-related complaints – ‘helps to revive and strengthen both body and mind’..
OTHER USES: The oil is used in mouthwashes, gargles, toothpastes and cough lozenges. ‘Thymol’ is isolated for pharmaceutical use in surgical dressings, disinfectants etc. Used as a fragrance component in soaps, toiletries, aftershaves, perfumes, colognes, etc. Extensively employed by the food and drink industry, especially in meat products.... thyme, common
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