adj. relating to or affecting the skin, especially the *dermis.
Redness of the skin due to dilatation of dermal blood vessels. It may be transient or chronic, localised or widespread, and it can be blanched by pressure. Erythema may be caused by excessive exposure to heat or ultraviolet light, or by in?ammation of the skin due to infection, DERMATITIS, and various allergic reactions – for example, to drugs. It may be emotional (e.g. as in ?ushing), mediated by the autonomic nervous system.
Erythema ab igne is a ?xed redness of the skin caused by chronic exposure to heat from a domestic ?re or radiator.
Erythema pernio (See CHILBLAIN.) Redness induced by spasm of the skin arterioles due to cold. It affects the hands, feet or calves in winter. The red swollen areas are cooler than normal.
Erythema nodosum A singular pattern of red, tender nodules occurring on the shins, often lasting several weeks. It may be caused by a streptococcal throat infection, primary tuberculosis, SARCOIDOSIS, or may be drug-induced.
Erythema multiforme is an acute allergic eruption of the extremities characterised by circular areas of erythema, purpura and blistering, which resolve over two or three weeks, caused by infections or drugs. In severe forms the mucous membranes of the eyes, mouth and genitalia may be involved.
Erythema infectiosum is an acute contagious disease of children caused by a parvo-virus (see PARVOVIRUSES). In young children a bright erythema of the face gives a ‘slapped cheek’ appearance.
... erythemaOccupational health includes both mental and physical health. It is about compliance with health-and-safety-at-work legislation (and common law duties) and about best practice in providing work environments that reduce risks to health and safety to lowest practicable levels. It includes workers’ ?tness to work, as well as the management of the work environment to accommodate people with disabilities, and procedures to facilitate the return to work of those absent with long-term illness. Occupational health incorporates several professional groups, including occupational physicians, occupational health nurses, occupational hygienists, ergonomists, disability managers, workplace counsellors, health-and-safety practitioners, and workplace physiotherapists.
In the UK, two key statutes provide a framework for occupational health: the Health and Safety at Work, etc. Act 1974 (HSW Act); and the Disability Discrimination Act 1995 (DDA). The HSW Act states that employers have a duty to protect the health, safety and welfare of their employees and to conduct their business in a way that does not expose others to risks to their health and safety. Employees and self-employed people also have duties under the Act. Modern health-and-safety legislation focuses on assessing and controlling risk rather than prescribing speci?c actions in di?erent industrial settings. Various regulations made under the HSW Act, such as the Control of Substances Hazardous to Health Regulations, the Manual Handling Operations Regulations and the Noise at Work Regulations, set out duties with regard to di?erent risks, but apply to all employers and follow the general principles of risk assessment and control. Risks should be controlled principally by removing or reducing the hazard at source (for example, by substituting chemicals with safer alternatives, replacing noisy machinery, or automating tasks to avoid heavy lifting). Personal protective equipment, such as gloves and ear defenders, should be seen as a last line of defence after other control measures have been put in place.
The employment provisions of the DDA require employers to avoid discriminatory practice towards disabled people and to make reasonable adjustments to working arrangements where a disabled person is placed at a substantial disadvantage to a non-disabled person. Although the DDA does not require employers to provide access to rehabilitation services – even for those injured or made ill at work – occupational-health practitioners may become involved in programmes to help people get back to work after injury or long-term illness, and many businesses see the retention of valuable sta? as an attractive alternative to medical retirement or dismissal on health grounds.
Although a major part of occupational-health practice is concerned with statutory compliance, the workplace is also an important venue for health promotion. Many working people rarely see their general practitioner and, even when they do, there is little time to discuss wider health issues. Occupational-health advisers can ?ll in this gap by providing, for example, workplace initiatives on stopping smoking, cardiovascular health, diet and self-examination for breast and testicular cancers. Such initiatives are encouraged because of the perceived bene?ts to sta?, to the employing organisation and to the wider public-health agenda. Occupational psychologists recognise the need for the working population to achieve a ‘work-life balance’ and the promotion of this is an increasing part of occupational health strategies.
The law requires employers to consult with their sta? on health-and-safety matters. However, there is also a growing understanding that successful occupational-health management involves workers directly in the identi?cation of risks and in developing solutions in the workplace. Trade unions play an active role in promoting occupational health through local and national campaigns and by training and advising elected workplace safety representatives.
Occupational medicine The branch of medicine that deals with the control, prevention, diagnosis, treatment and management of ill-health and injuries caused or made worse by work, and with ensuring that workers are ?t for the work they do.
Occupational medicine includes: statutory surveillance of workers’ exposure to hazardous agents; advice to employers and employees on eliminating or reducing risks to health and safety at work; diagnosis and treatment/management of occupational illness; advice on adapting the working environment to suit the worker, particularly those with disabilities or long-term health problems; and advice on the return to work and, if necessary, rehabilitation of workers absent through illness. Occupational physicians may play a wider role in monitoring the health of workplace populations and in advising employers on controlling health hazards where ill-health trends are observed. They may also conduct epidemiological research (see EPIDEMIOLOGY) on workplace diseases.
Because of the occupational physician’s dual role as adviser to both employer and employee, he or she is required to be particularly diligent with regards to the individual worker’s medical CONFIDENTIALITY. Occupational physicians need to recognise in any given situation the context they are working in, and to make sure that all parties are aware of this.
Occupational medicine is a medical discipline and thus is only part of the broader ?eld of occupational health. Although there are some speci?c clinical duties associated with occupational medicine, such as diagnosis of occupational disease and medical screening, occupational physicians are frequently part of a multidisciplinary team that might include, for example, occupational-health nurses, healthand-safety advisers, ergonomists, counsellors and hygienists. Occupational physicians are medical practitioners with a post-registration quali?cation in occupational medicine. They will have completed a period of supervised in-post training. In the UK, the Faculty of Occupational Medicine of the Royal College of Physicians has three categories of membership, depending on quali?cations and experience: associateship (AFOM); membership (MFOM); and fellowship (FFOM).
Occupational diseases Occupational diseases are illnesses that are caused or made worse by work. In their widest sense, they include physical and mental ill-health conditions.
In diagnosing an occupational disease, the clinician will need to examine not just the signs and symptoms of ill-health, but also the occupational history of the patient. This is important not only in discovering the cause, or causes, of the disease (work may be one of a number of factors), but also in making recommendations on how the work should be modi?ed to prevent a recurrence – or, if necessary, in deciding whether or not the worker is able to return to that type of work. The occupational history will help in deciding whether or not other workers are also at risk of developing the condition. It will include information on:
the nature of the work.
how the tasks are performed in practice.
the likelihood of exposure to hazardous agents (physical, chemical, biological and psychosocial).
what control measures are in place and the extent to which these are adhered to.
previous occupational and non-occupational exposures.
whether or not others have reported similar symptoms in relation to the work. Some conditions – certain skin conditions,
for example – may show a close relationship to work, with symptoms appearing directly only after exposure to particular agents or possibly disappearing at weekends or with time away from work. Others, however, may be chronic and can have serious long-term implications for a person’s future health and employment.
Statistical information on the prevalence of occupational disease in the UK comes from a variety of sources, including o?cial ?gures from the Industrial Injuries Scheme (see below) and statutory reporting of occupational disease (also below). Neither of these o?cial schemes provides a representative picture, because the former is restricted to certain prescribed conditions and occupations, and the latter suffers from gross under-reporting. More useful are data from the various schemes that make up the Occupational Diseases Intelligence Network (ODIN) and from the Labour Force Survey (LFS). ODIN data is generated by the systematic reporting of work-related conditions by clinicians and includes several schemes. Under one scheme, more than 80 per cent of all reported diseases by occupational-health physicians fall into just six of the 42 clinical disease categories: upper-limb disorders; anxiety, depression and stress disorders; contact DERMATITIS; lower-back problems; hearing loss (see DEAFNESS); and ASTHMA. Information from the LFS yields a similar pattern in terms of disease frequency. Its most recent survey found that over 2 million people believed that, in the previous 12 months, they had suffered from an illness caused or made worse by work and that
19.5 million working days were lost as a result. The ten most frequently reported disease categories were:
stress and mental ill-health (see MENTAL ILLNESS): 515,000 cases.
back injuries: 508,000.
upper-limb and neck disorders: 375,000.
lower respiratory disease: 202,000.
deafness, TINNITUS or other ear conditions: 170,000.
lower-limb musculoskeletal conditions: 100,000.
skin disease: 66,000.
headache or ‘eyestrain’: 50,000.
traumatic injury (includes wounds and fractures from violent attacks at work): 34,000.
vibration white ?nger (hand-arm vibration syndrome): 36,000. A person who develops a chronic occu
pational disease may be able to sue his or her employer for damages if it can be shown that the employer was negligent in failing to take reasonable care of its employees, or had failed to provide a system of work that would have prevented harmful exposure to a known health hazard. There have been numerous successful claims (either awarded in court, or settled out of court) for damages for back and other musculoskeletal injuries, hand-arm vibration syndrome, noise-induced deafness, asthma, dermatitis, MESOTHELIOMA and ASBESTOSIS. Employers’ liability (workers’ compensation) insurers are predicting that the biggest future rise in damages claims will be for stress-related illness. In a recent study, funded by the Health and Safety Executive, about 20 per cent of all workers – more than 5 million people in the UK – claimed to be ‘very’ or ‘extremely’ stressed at work – a statistic that is likely to have a major impact on the long-term health of the working population.
While victims of occupational disease have the right to sue their employers for damages, many countries also operate a system of no-fault compensation for the victims of prescribed occupational diseases. In the UK, more than 60 diseases are prescribed under the Industrial Injuries Scheme and a person will automatically be entitled to state compensation for disability connected to one of these conditions, provided that he or she works in one of the occupations for which they are prescribed. The following short list gives an indication of the types of diseases and occupations prescribed under the scheme:
CARPAL TUNNEL SYNDROME connected to the use of hand-held vibrating tools.
hearing loss from (amongst others) use of pneumatic percussive tools and chainsaws, working in the vicinity of textile manufacturing or woodworking machines, and work in ships’ engine rooms.
LEPTOSPIROSIS – infection with Leptospira (various listed occupations).
viral HEPATITIS from contact with human blood, blood products or other sources of viral hepatitis.
LEAD POISONING, from any occupation causing exposure to fumes, dust and vapour from lead or lead products.
asthma caused by exposure to, among other listed substances, isocyanates, curing agents, solder ?ux fumes and insects reared for research.
mesothelioma from exposure to asbestos.
In the UK, employers and the self-employed have a duty to report all occupational injuries (if the employee is o? work for three days or more as a result), diseases or dangerous incidents to the relevant enforcing authority (the Health and Safety Executive or local-authority environmental-health department) under the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 1995 (RIDDOR). Despite this statutory duty, comparatively few diseases are reported so that ?gures generated from RIDDOR reports do not give a useful indication of the scale of occupational diseases in the UK. The statutory reporting of injuries is much better, presumably because of the clear and acute relationship between a workplace accident and the resultant injury. More than 160,000 injuries are reported under RIDDOR every year compared with just 2,500 or so occupational diseases, a gross underestimate of the true ?gure.
There are no precise ?gures for the number of people who die prematurely because of work-related ill-health, and it would be impossible to gauge the exact contribution that work has on, for example, cardiovascular disease and cancers where the causes are multifactorial. The toll would, however, dwarf the number of deaths caused by accidents at work. Around 250 people are killed by accidents at work in the UK each year – mesothelioma, from exposure to asbestos at work, alone kills more than 1,300 people annually.
The following is a sample list of occupational diseases, with brief descriptions of their aetiologies.
Inhaled materials
PNEUMOCONIOSIS covers a group of diseases which cause ?brotic lung disease following the inhalation of dust. Around 250–300 new cases receive bene?t each year – mostly due to coal dust with or without silica contamination. SILICOSIS is the more severe disease. The contraction in the size of the coal-mining industry as well as improved dust suppression in the mines have diminished the importance of this disease, whereas asbestos-related diseases now exceed 1,000 per year. Asbestos ?bres cause a restrictive lung disease but also are responsible for certain malignant conditions such as pleural and peritoneal mesothelioma and lung cancer. The lung-cancer risk is exacerbated by cigarette-smoking.
Even though the use of asbestos is virtually banned in the UK, many workers remain at risk of exposure because of the vast quantities present in buildings (much of which is not listed in building plans). Carpenters, electricians, plumbers, builders and demolition workers are all liable to exposure from work that disturbs existing asbestos. OCCUPATIONAL ASTHMA is of increasing importance – not only because of the recognition of new allergic agents (see ALLERGY), but also in the number of reported cases. The following eight substances are most frequently linked to occupational asthma (key occupations in brackets): isocyanates (spray painters, electrical processors); ?our and grain (bakers and farmers); wood dust (wood workers); glutaraldehyde (nurses, darkroom technicians); solder/colophony (welders, electronic assembly workers); laboratory animals (technicians, scientists); resins and glues (metal and electrical workers, construction, chemical processors); and latex (nurses, auxiliaries, laboratory technicians).
The disease develops after a short, symptomless period of exposure; symptoms are temporally related to work exposures and relieved by absences from work. Removal of the worker from exposure does not necessarily lead to complete cessation of symptoms. For many agents, there is no relationship with a previous history of ATOPY. Occupational asthma accounts for about 10 per cent of all asthma cases. DERMATITIS The risk of dermatitis caused by an allergic or irritant reaction to substances used or handled at work is present in a wide variety of jobs. About three-quarters of cases are irritant contact dermatitis due to such agents as acids, alkalis and solvents. Allergic contact dermatitis is a more speci?c response by susceptible individuals to a range of allergens (see ALLERGEN). The main occupational contact allergens include chromates, nickel, epoxy resins, rubber additives, germicidal agents, dyes, topical anaesthetics and antibiotics as well as certain plants and woods. Latex gloves are a particular cause of occupational dermatitis among health-care and laboratory sta? and have resulted in many workers being forced to leave their profession through ill-health. (See also SKIN, DISEASES OF.)
Musculoskeletal disorders Musculoskeletal injuries are by far the most common conditions related to work (see LFS ?gures, above) and the biggest cause of disability. Although not all work-related, musculoskeletal disorders account for 36.5 per cent of all disabilities among working-age people (compared with less than 4 per cent for sight and hearing impairment). Back pain (all causes – see BACKACHE) has been estimated to cause more than 50 million days lost every year in sickness absence and costs the UK economy up to £5 billion annually as a result of incapacity or disability. Back pain is a particular problem in the health-care sector because of the risk of injury from lifting and moving patients. While the emphasis should be on preventing injuries from occurring, it is now well established that the best way to manage most lower-back injuries is to encourage the patient to continue as normally as possible and to remain at work, or to return as soon as possible even if the patient has some residual back pain. Those who remain o? work on long-term sick leave are far less likely ever to return to work.
Aside from back injuries, there are a whole range of conditions affecting the upper limbs, neck and lower limbs. Some have clear aetiologies and clinical signs, while others are less well de?ned and have multiple causation. Some conditions, such as carpal tunnel syndrome, are prescribed diseases in certain occupations; however, they are not always caused by work (pregnant and older women are more likely to report carpal tunnel syndrome irrespective of work) and clinicians need to be careful when assigning work as the cause without ?rst considering the evidence. Other conditions may be revealed or made worse by work – such as OSTEOARTHRITIS in the hand. Much attention has focused on injuries caused by repeated movement, excessive force, and awkward postures and these include tenosynovitis (in?ammation of a tendon) and epicondylitis. The greatest controversy surrounds upper-limb disorders that do not present obvious tissue or nerve damage but nevertheless give signi?cant pain and discomfort to the individual. These are sometimes referred to as ‘repetitive strain injury’ or ‘di?use RSI’. The diagnosis of such conditions is controversial, making it di?cult for sufferers to pursue claims for compensation through the courts. Psychosocial factors, such as high demands of the job, lack of control and poor social support at work, have been implicated in the development of many upper-limb disorders, and in prevention and management it is important to deal with the psychological as well as the physical risk factors. Occupations known to be at particular risk of work-related upper-limb disorders include poultry processors, packers, electronic assembly workers, data processors, supermarket check-out operators and telephonists. These jobs often contain a number of the relevant exposures of dynamic load, static load, a full or excessive range of movements and awkward postures. (See UPPER LIMB DISORDERS.)
Physical agents A number of physical agents cause occupational ill-health of which the most important is occupational deafness. Workplace noise exposures in excess of 85 decibels for a working day are likely to cause damage to hearing which is initially restricted to the vital frequencies associated with speech – around 3–4 kHz. Protection from such noise is imperative as hearing aids do nothing to ameliorate the neural damage once it has occurred.
Hand-arm vibration syndrome is a disorder of the vascular and/or neural endings in the hands leading to episodic blanching (‘white ?nger’) and numbness which is exacerbated by low temperature. The condition, which is caused by vibrating tools such as chain saws and pneumatic hammers, is akin to RAYNAUD’S DISEASE and can be disabling.
Decompression sickness is caused by a rapid change in ambient pressure and is a disease associated with deep-sea divers, tunnel workers and high-?ying aviators. Apart from the direct effects of pressure change such as ruptured tympanic membrane or sinus pain, the more serious damage is indirectly due to nitrogen bubbles appearing in the blood and blocking small vessels. Central and peripheral nervous-system damage and bone necrosis are the most dangerous sequelae.
Radiation Non-ionising radiation from lasers or microwaves can cause severe localised heating leading to tissue damage of which cataracts (see under EYE, DISORDERS OF) are a particular variety. Ionising radiation from radioactive sources can cause similar acute tissue damage to the eyes as well as cell damage to rapidly dividing cells in the gut and bone marrow. Longer-term effects include genetic damage and various malignant disorders of which LEUKAEMIA and aplastic ANAEMIA are notable. Particular radioactive isotopes may destroy or induce malignant change in target organs, for example, 131I (thyroid), 90Sr (bone). Outdoor workers may also be at risk of sunburn and skin cancers. OTHER OCCUPATIONAL CANCERS Occupation is directly responsible for about 5 per cent of all cancers and contributes to a further 5 per cent. Apart from the cancers caused by asbestos and ionising radiation, a number of other occupational exposures can cause human cancer. The International Agency for Research on Cancer regularly reviews the evidence for carcinogenicity of compounds and industrial processes, and its published list of carcinogens is widely accepted as the current state of knowledge. More than 50 agents and processes are listed as class 1 carcinogens. Important occupational carcinogens include asbestos (mesothelioma, lung cancer); polynuclear aromatic hydrocarbons such as mineral oils, soots, tars (skin and lung cancer); the aromatic amines in dyestu?s (bladder cancer); certain hexavalent chromates, arsenic and nickel re?ning (lung cancer); wood and leather dust (nasal sinus cancer); benzene (leukaemia); and vinyl chloride monomer (angiosarcoma of the liver). It has been estimated that elimination of all known occupational carcinogens, if possible, would lead to an annual saving of 5,000 premature deaths in Britain.
Infections Two broad categories of job carry an occupational risk. These are workers in contact with animals (farmers, veterinary surgeons and slaughtermen) and those in contact with human sources of infection (health-care sta? and sewage workers).
Occupational infections include various zoonoses (pathogens transmissible from animals to humans), such as ANTHRAX, Borrelia burgdorferi (LYME DISEASE), bovine TUBERCULOSIS, BRUCELLOSIS, Chlamydia psittaci, leptospirosis, ORF virus, Q fever, RINGWORM and Streptococcus suis. Human pathogens that may be transmissible at work include tuberculosis, and blood-borne pathogens such as viral hepatitis (B and C) and HIV (see AIDS/HIV). Health-care workers at risk of exposure to infected blood and body ?uids should be immunised against hapatitis B.
Poisoning The incidence of occupational poisonings has diminished with the substitution of noxious chemicals with safer alternatives, and with the advent of improved containment. However, poisonings owing to accidents at work are still reported, sometimes with fatal consequences. Workers involved in the application of pesticides are particularly at risk if safe procedures are not followed or if equipment is faulty. Exposure to organophosphate pesticides, for example, can lead to breathing diffculties, vomiting, diarrhoea and abdominal cramps, and to other neurological effects including confusion and dizziness. Severe poisonings can lead to death. Exposure can be through ingestion, inhalation and dermal (skin) contact.
Stress and mental health Stress is an adverse reaction to excessive pressures or demands and, in occupational-health terms, is di?erent from the motivational impact often associated with challenging work (some refer to this as ‘positive stress’). Stress at work is often linked to increasing demands on workers, although coping can often prevent the development of stress. The causes of occupational stress are multivariate and encompass job characteristics (e.g. long or unsocial working hours, high work demands, imbalance between e?ort and reward, poorly managed organisational change, lack of control over work, poor social support at work, fear of redundancy and bullying), as well as individual factors (such as personality type, personal circumstances, coping strategies, and availability of psychosocial support outside work). Stress may in?uence behaviours such as smoking, alcohol consumption, sleep and diet, which may in turn affect people’s health. Stress may also have direct effects on the immune system (see IMMUNITY) and lead to a decline in health. Stress may also alter the course and response to treatment of conditions such as cardiovascular disease. As well as these general effects of stress, speci?c types of disorder may be observed.
Exposure to extremely traumatic incidents at work – such as dealing with a major accident involving multiple loss of life and serious injury
(e.g. paramedics at the scene of an explosion or rail crash) – may result in a chronic condition known as post-traumatic stress disorder (PTSD). PTSD is an abnormal psychological reaction to a traumatic event and is characterised by extreme psychological discomfort, such as anxiety or panic when reminded of the causative event; sufferers may be plagued with uncontrollable memories and can feel as if they are going through the trauma again. PTSD is a clinically de?ned condition in terms of its symptoms and causes and should not be used to include normal short-term reactions to trauma.... occupational health, medicine and diseases
Structure
CORIUM The foundation layer. It overlies the subcutaneous fat and varies in thickness from 0·5–3.0 mm. Many nerves run through the corium: these have key roles in the sensations of touch, pain and temperature (see NEURON(E)). Blood vessels nourish the skin and are primarily responsible for regulating the body temperature. Hairs are bedded in the corium, piercing the epidermis (see below) to cover the skin in varying amounts in di?erent parts of the body. The sweat glands are also in the corium and their ducts lead to the surface. The ?brous tissue of the corium comprises interlocking white ?brous elastic bundles. The corium contains many folds, especially over joints and on the palms of hands and soles of feet with the epidermis following the contours. These are permanent throughout life and provide unique ?ngerprinting identi?cation. HAIR Each one has a root and shaft, and its varying tone originates from pigment scattered throughout it. Bundles of smooth muscle (arrectores pilorum) are attached to the root and on contraction cause the hair to stand vertical. GLANDS These occur in great numbers in the skin. SEBACEOUS GLANDS secrete a fatty substance and sweat glands a clear watery ?uid (see PERSPIRATION). The former are made up of a bunch of small sacs producing fatty material that reaches the surface via the hair follicle. Around three million sweat or sudoriparous glands occur all over the body surface; sited below the sebaceous glands they are unconnected to the hairs. EPIDERMIS This forms the outer layer of skin and is the cellular layer covering the body surface: it has no blood vessels and its thickness varies from 1 mm on the palms and soles to 0·1 mm on the face. Its outer, impervious, horny layer comprises several thicknesses of ?at cells (pierced only by hairs and sweat-gland openings) that are constantly rubbed o? as small white scales; they are replaced by growing cells from below. The next, clear layer forms a type of membrane below which the granular stratum cells are changing from their origins as keratinocytes in the germinative zone, where ?ne sensory nerves also terminate. The basal layer of the germinative zone contains melanocytes which produce the pigment MELANIN, the cause of skin tanning.
Nail A modi?cation of skin, being analagous to the horny layer, but its cells are harder and more adherent. Under the horny nail is the nail bed, comprising the well-vascularised corium (see above) and the germinative zone. Growth occurs at the nail root at a rate of around 0·5 mm a week – a rate that increases in later years of life.
Skin functions By its ability to control sweating and open or close dermal blood vessels, the skin plays a crucial role in maintaining a constant body temperature. Its toughness protects the body from mechanical injury. The epidermis is a two-way barrier: it prevents the entry of noxious chemicals and microbes, and prevents the loss of body contents, especially water, electrolytes and proteins. It restricts electrical conductivity and to a limited extent protects against ultraviolet radiation.
The Langerhans’ cells in the epidermis are the outposts of the immune system (see IMMUNITY), just as the sensory nerves in the skin are the outposts of the nervous system. Skin has a social function in its ability to signal emotions such as fear or anger. Lastly it has a role in the synthesis of vitamin D.... skin
FAMILY: Apiaceae (Umbelliferae)
SYNONYMS: T. ammi, Ammi copticum, Carum ajowan, C. copticum, Ptychotis ajowan, ajuan, omum.
GENERAL DESCRIPTION: An annual herb with a greyish-brown seed, which resembles parsley in appearance.
DISTRIBUTION: Chiefly India, also Afghanistan, Egypt, the West Indies and the Seychelle Islands.
OTHER SPECIES: see Botanical Classification section.
HERBAL/FOLK TRADITION: The seeds are used extensively in curry powders and as a general household remedy for intestinal problems. The tincture, essential oil and ‘thymol’ are used in Indian medicine, particularly for cholera.
ACTIONS: Powerful antiseptic and germicide, carminative.
EXTRACTION: Essential oil by steam distillation from the seed.
CHARACTERISTICS: A yellow-orange or reddish liquid with a herbaceous-spicy medicinal odour, much like thyme.
PRINCIPAL CONSTITUENTS: Thymol, pinene, cymene, dipentene, terpinene and carvacrol, among others.
SAFETY DATA: Possible mucous membrane and dermal irritant. Due to high thymol level, should be avoided in pregnancy. Toxicity levels are unknown.
AROMATHERAPY/HOME: USE Not recommended.
OTHER USES: It has been used extensively for the isolation of thymol, but this has largely been replaced by synthetic thymol.... ajowan
FAMILY: Myrtaceae
SYNONYMS: P. officinalis, pimento, pimenta, Jamaica pepper.
GENERAL DESCRIPTION: An evergreen tree which reaches about 10 metres high and begins to produce fruit in its third year. Each fruit contains two kidney-shaped green seeds which turn glossy black upon ripening.
DISTRIBUTION: Indigenous to the West Indies and South America, it is cultivated extensively in Jamaica, Cuba and, to a lesser degree, in Central America. Imported berries are distilled in Europe and America.
OTHER SPECIES: Four other varieties of pimento are found in Venezuela, Guyana and the West Indies which are used locally as spices.
HERBAL/FOLK TRADITION: Used for flatulent indigestion and externally for neuralgic or rheumatic pain. Pimento water is used as a vehicle for medicines which ease dyspepsia and constipation since it helps prevent griping pains. It is used extensively as a domestic spice – allspice is so called because it tastes like a combination of cloves, juniper berries, cinnamon and pepper.
ACTIONS: Anaesthetic, analgesic, anti-oxidant, antiseptic, carminative, muscle relaxant, rubefacient, stimulant, tonic.
EXTRACTION: Essential oil by steam distillation from 1. the leaves, and 2. the fruit. The green unripe berries contain more oil than the ripe berries, but the largest percentage of oil is contained in the shell of the fruit. An oleoresin from the berries is also produced in small quantities.
CHARACTERISTICS: 1. Pimenta leaf oil is a yellowish-red or brownish liquid with a powerful sweet-spicy scent, similar to cloves. 2. Pimenta berry oil is a pale yellow liquid with a sweet warm balsamic-spicy bodynote (middle note) and fresh, clean top note. It blends well with ginger, geranium, lavender, opopanax, labdanum, ylang ylang, patchouli, neroli, oriental and spicy bases.
PRINCIPAL CONSTITUENTS: Mainly eugenol, less in the fruit (60–80 per cent) than in the leaves (up to 96 per cent), also methyl eugenol, cineol, phellandrene and cryophyllene among others.
SAFETY DATA: Eugenol irritates the mucous membranes, and has been found to cause dermal irritation. Pimenta leaf and berry oil should therefore be used with care in low dilutions only.
AROMATHERAPY/HOME: USE:
Circulation, muscles and joints: Arthritis, fatigue, muscle cramp, rheumatism, stiffness etc. ‘Used in tiny amounts … in a massage oil for chest infections, for severe muscle spasm to restore mobility quickly, or where extreme cold is experienced.’1
Respiratory System: Chills, congested coughs, bronchitis.
Digestive System: Cramp, flatulence, indigestion, nausea.
Nervous System: Depression, nervous exhaustion, neuralgia, tension and stress.
OTHER USES: Used in aromatic carminative medicines; as a fragrance component in cosmetics and perfumes, especially soaps, aftershaves, spicy and oriental fragrances. Both leaf and berry oil are used extensively for flavouring foods, especially savoury and frozen foods, as well as alcoholic and soft drinks.... allspice
FAMILY: Illiciaceae
SYNONYMS: Chinese anise, illicium, Chinese star anise.
GENERAL DESCRIPTION: Evergreen tree up to 12 metres high with a tall, slender white trunk. It bears fruit which consist of five to thirteen seed-bearing follicles attached to a central axis in the shape of a star.
DISTRIBUTION: Native to south east China, also Vietnam, India and Japan. Mainly produced in China.
OTHER SPECIES: Several other related species, e.g. Japanese star anise which is highly poisonous!
HERBAL/FOLK TRADITION: Used in Chinese medicine for over 1300 years for its stimulating effect on the digestive system and for respiratory disorders such as bronchitis and unproductive coughs. In the East generally, it is used as a remedy for colic and rheumatism, and often chewed after meals to sweeten the breath and promote digestion. A common oriental domestic spice.
ACTIONS: Antiseptic, carminative, expectorant, insect repellent, stimulant.
EXTRACTION: Essential oil by steam distillation from the fruits, fresh or partially dried. An oil is also produced from the leaves in small quantities.
CHARACTERISTICS: A pale yellow liquid with a warm, spicy, extremely sweet, liquorice like scent. It blends well with rose, lavender, orange, pine and other spice oils, and has excellent masking properties.
PRINCIPAL CONSTITUENTS: Trans-anethole (80–90 per cent).
SAFETY DATA: Despite the anethole content, it does not appear to be a dermal irritant, unlike aniseed. In large doses it is narcotic and slows down the circulation; it can lead to cerebral disorders. Use in moderation only.
AROMATHERAPY/HOME: USE
Circulation Muscles And Joints: Muscular aches and pains, rheumatism.
Respiratory System: Bronchitis, coughs.
Digestive System: Colic, cramp, flatulence, indigestion.
Immune system: Colds.
OTHER USES: By the pharmaceutical industry in cough mixtures, lozenges, etc. and to mask undesirable odours and flavours in drugs. As a fragrance component in soaps, toothpaste and detergents as well as cosmetics and perfumes. Widely used for flavouring food, especially confectionery, alcoholic and soft drinks.... anise, star
FAMILY: Myrtaceae
SYNONYMS: Myrcia acris, Pimenta acris, myrcia, bay, bay rum tree, wild cinnamon, bayberry, bay leaf (oil).
GENERAL DESCRIPTION: A wild-growing tropical evergreen tree up to 8 metres high, with large leathery leaves and aromatic fruits.
DISTRIBUTION: Native to the West Indies, particularly Dominica where the essential oil is produced.
OTHER SPECIES: There are several other varieties, for example the anise-scented and lemon-scented bay, the oils of which have a totally different chemical composition. Not to be confused with bay laurel, the common household spice, nor with the North American bayberry or wax myrtle (Myrcia cerifera) well known for its wax yielding berries.
HERBAL/FOLK TRADITION: The West Indian bay tree is often grown in groves together with the allspice or pimento bush, then the fruits of both are dried and powdered for the preparation of the household allspice. The so-called bay rum tree also provides the basic ingredient for the famous old hair tonic, which is made from the leaves by being distilled in rum. ‘A hair application with both fragrant and tonic virtues … useful for those who suffer from greasy hair and need a spirit-based, scalp-stimulating lotion to help them to control their locks!’9
ACTIONS: Analgesic, anticonvulsant, antineuralgic, antirheumatic, antiseptic, astringent, expectorant, stimulant, tonic (for hair).
EXTRACTION: Essential oil by water or steam distillation from the leaves. An oleoresin is also produced in small quantities.
CHARACTERISTICS: A dark yellow mobile liquid with a fresh-spicy top note and a sweet-balsamic undertone. It blends well with lavander, lavandin, rosemary, geranium, ylang ylang, citrus and spice oils.
PRINCIPAL CONSTITUENTS: Eugenol (up to 56 per cent), myrcene, chavicol and, in lesser amounts, methyl eugenol, linalol, limonene, among others.
SAFETY DATA: Moderately toxic due to high eugenol content; also a mucous membrane irritant – use in moderation only. Unlike bay laurel, however, it does not appear to cause dermal irritation or sensitization.
AROMATHERAPY/HOME: USE
Skin Care: Scalp stimulant, hair rinse for dandruff, greasy, lifeless hair, and premoting growth.
Circulation, Muscles And Joints: Muscular and articular aches and pains, neuralgia, poor circulation, rheumatism, sprains, strains.
IMMUNE SYSTEM: Colds, ’flu, infectious diseases.
OTHER USES: Extensively used in fragrance work, in soaps, detergents, perfumes, aftershaves and hair lotions, including bay rum. Employed as a flavour ingredient in many major food categories, especially condiments, as well as alcoholic and soft drinks.... bay, west indian
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.... bergamot
FAMILY: Dipterocarpaceae
SYNONYMS: D. camphora, Borneo camphor, East Indian camphor, Baros camphor, Sumatra camphor, Malayan camphor.
GENERAL DESCRIPTION: The camphora tree grows to a great height, a majestic tree often over 25 metres high, with a thick trunk up to 2 metres in diameter. Borneol is a natural exudation found beneath the bark in crevices and fissures of some mature trees (about 1 per cent); young trees produce only a clear yellow liquid known as ‘liquid camphor’.
DISTRIBUTION: Native to Borneo and Sumatra.
OTHER SPECIES: To be distinguished from the Japanese or Formosa type of camphor, more commonly used in Europe, which is relatively toxic. See also Botanical Classification section.
HERBAL/FOLK TRADITION: Borneol has long been regarded as a panacea by many Eastern civilizations, especially in ancient Persia, India and China. It was used as a powerful remedy against plague and other infectious diseases, stomach and bowel complaints. In China it was also used for embalming purposes. ‘It is mentioned by Marco Polo in the thirteenth century and Camoens in 1571 who called it the “balsam of disease”.’. It is valued for ceremonial purposes in the east generally, and in China particularly for funeral rites. Its odour repels insects and ants, and it is therefore highly regarded as timber for the construction of buildings.
ACTIONS: Mildly analgesic, antidepressant, antiseptic, antispasmodic, antiviral, carminative, rubefacient, stimulant of the adrenal cortex, tonic (cardiac and general).
EXTRACTION: The borneol is collected from the tree trunk in its crude crystalline form (the natives test each tree first by making incisions in the trunk to detect its presence). The so-called ‘oil of borneol’ is extracted by steam distillation of the wood.
CHARACTERISTICS: Watery white to viscous black oil depending upon the amount of camphor which it contains, with a distinctive, sassafras-like, camphoraceous odour.
PRINCIPAL CONSTITUENTS: The crude is made up of mainly cl-borneol which is an alcohol, not a ketone (like Japanese camphor). The oil contains approx. 35 per cent terpenes: pinene, camphene, dipentene; 10 per cent alcohols: d-borneol, terpineol; 20 per cent sesquiterpenes, and 35 per cent resin.
SAFETY DATA: Non-toxic, non-sensitizing, dermal irritant in concentration.
AROMATHERAPY/HOME: USE
Skin Care: Cuts, bruises, insect repellent,
Circulation Muscles And Joints: Debility, poor circulation, rheumatism, sprains.
Respiratory System: Bronchitis, coughs.
Immune System: Colds, fever, ‘flu and other infectious diseases.
Nervous System: Nervous exhaustion, stress-related conditions, neuralgia.
OTHER USES: It is used to scent soap in the East but is still relatively unknown in the West in pharmaceutical and perfumery work. In China and Japan it is used for making varnish and ink; also asa dilutant for artists’ colours. Mainly used for ritual purposes in the East.... borneol
FAMILY: Apiaceae (Umbelliferae)
SYNONYMS: Apium carvi, carum, caraway fruits.
GENERAL DESCRIPTION: A biennial herb up to 0.75 metres high with a much-branched stem, finely cut leaves and umbels of white flowers, with a thick and tapering root. The small seeds are curved with five distinct pale ridges.
DISTRIBUTION: Native to Europe and western Asia, naturalized in North America. Now widely cultivated especially in Germany, Holland, Scandinavia and Russia.
OTHER SPECIES: There are several varieties depending on origin – the English, Dutch and German types derive from Prussia, which are distinct from the Scandinavian variety. Those plants grown in northerly latitudes produce more oil.
HERBAL/FOLK TRADITION: Used extensively as a domestic spice, especially in bread, cakes and cheeses. Traditional remedy for dyspepsia, intestinal colic, menstrual cramps, poor appetite, laryngitis and bronchitis. It promotes milk secretion and is considered specific for flatulent colic in children, according to the British Herbal Pharmacopoeia.
ACTIONS: Antihistaminic, antimicrobial, antiseptic, aperitif, astringent, carminative, diuretic, emmenagogue, expectorant, galactagogue, larvicidal, stimulant, spasmolytic, stomachic, tonic, vermifuge.
EXTRACTION: Essential oil by steam distillation from the dried ripe seed or fruit (approx. 2–8 per cent yield).
CHARACTERISTICS: Crude caraway oil is a pale yellowish-brown liquid with a harsh, spicy odour. The redistilled oil is colourless to pale yellow, with a strong, warm, sweet-spicy odour, like rye bread. It blends well with jasmine, cinnamon, cassia and other spices; however, it is very overpowering.
PRINCIPAL CONSTITUENTS: Mainly carvone (50–60 per cent) and limonene (40 per cent), with carveol, dihydrocarveol, dihydrocarvone, pinene, phellandrene, among others.
SAFETY DATA: Non-toxic, non-sensitizing, may cause dermal irritation in concentration.
AROMATHERAPY/HOME: USE
Respiratory System: Bronchitis, coughs, laryngitis.
Digestive System: Dyspepsia, colic, flatulence, gastric spasm, nervous indigestion, poor appetite. See also sweet fennel and dill.
Immune system: Colds.
OTHER USES: Used in carminative, stomachic and laxative preparations and as a flavour ingredient in pharmaceuticals; also to mask unpleasant tastes and odours. Fragrance component in toothpaste, mouthwash products, cosmetics and perfumes. Extensively used as a flavour ingredient in most major food categories, especially condiments. The German brandy ‘Kummel’ is made from the seeds.... caraway
FAMILY: Lauraceae
SYNONYMS: C. aromaticum, Laurus cassia, Chinese cinnamon, false cinnamon, cassia cinnamon, cassia lignea.
GENERAL DESCRIPTION: A slender, evergreen tree up to 20 metres high, with leathery leaves and small white flowers. It is usually cut back to form bushes for commercial production.
DISTRIBUTION: Native to the south eastern parts of China; found to a lesser extent in Vietnam and India (Cochin).
OTHER SPECIES: Not to be confused with the Ceylon Cinnamon bark (C. verum) which is from a related species. There are also several other varieties from different regions used for essential oil production – see Botanical Classification section.
HERBAL/FOLK TRADITION: Extensively used as local domestic spice. It is used medicinally in much the same way as Ceylon cinnamon, mainly for digestive complaints such as flatulent dyspepsia, colic, diarrhoea and nausea, as well as the common cold, rheumatism, kidney and reproductive complaints.
The powdered bark is current in the British Herbal Pharmacopoeia as a specific for flatulent dyspepsia or colic with nausea.
ACTIONS: Antidiarrhoeal, anti-emetic, antimicrobial, astringent, carminative, spasmolytic.
EXTRACTION: Essential oil 1. by steam distillation from the leaves, and 2. by water distillation from the bark, leaves, twigs and stalks.
CHARACTERISTICS: 1. Leaf oil is brownish yellow (the rectified oil is pale yellow), with a sweet woody-spicy tenacious odour. 2. Bark oil is a dark brown liquid with a strong, spicy warm, resinous odour.
PRINCIPAL CONSTITUENTS: Leaf and Bark oil contain mainly cinnamic aldehyde (75–90 per cent) with some methyl eugenol, salicylaldehyde and methylsalicylaldehyde.
SAFETY DATA: Dermal toxin, dermal irritant, dermal sensitizer, mucous membrane irritant.
AROMATHERAPY/HOME: USE None. ‘Should never be used on the skin (one of the most hazardous oils).’.
OTHER USES: Some pharmaceutical applications due to bactericidal properties, such as mouthwashes, toothpastes, gargles; also tonic and carminative preparations. Extensively used in food flavouring, including alcoholic and soft drinks. Little used in perfumes and cosmetics, due to its dark colour.
CASSIE... cassia
FAMILY: Lauraceae
SYNONYMS: C. verum, Laurus cinnamomum, Ceylon cinnamon, Seychelles cinnamon, Madagascar cinnamon, true cinnamon, cinnamon leaf (oil), cinnamon bark (oil).
GENERAL DESCRIPTION: A tropical evergreen tree up to 15 metres high, with strong branches and thick scabrous bark with young shoots speckled greeny-orange. It has shiny green, leathery leaves, small white flowers and oval bluish-white berries. The leaves have a spicy smell when bruised.
DISTRIBUTION: Native to Sri Lanka, Madagascar, the Comoro Islands, South India, Burma and Indochina. It is also cultivated in India, Jamaica and Africa – each region tending to have its own particular species.
OTHER SPECIES: Madagascar cinnamon is considered superior to the various other types of cinnamon such as the Saigon cinnamon (C. loureirii) and the Batavia Cinnamon (C. burmanii). See also Botanical Classification section.
HERBAL/FOLK TRADITION: The inner bark of the new shoots from the cinnamon tree are gathered every two years and sold in the form of sticks for use as a domestic spice. It has been used for thousands of years in the east for a wide range of complaints including colds, ’flu, digestive and menstrual problems, rheumatism, kidney troubles and as a general stimulant. Current in the British Herbal Pharmacopoeia as a specific for flatulent colic and dyspepsia with nausea.
ACTIONS: Anthelmintic, antidiarrhoeal, antidote (to poison), antimicrobial, antiseptic, antispasmodic, antiputrescent, aphrodisiac, astringent, carminative, digestive, emmenagogue, haemostatic, orexigenic, parasiticide, refrigerant, spasmolytic, stimulant (circulatory, cardiac, respiratory), stomachic, vermifuge.
EXTRACTION: Essential oil by water or steam distillation from the 1. leaves and twigs, and 2. dried inner bark.
CHARACTERISTICS: 1. A yellow to brownish liquid with a warm-spicy, somewhat harsh odour. 2. A pale to dark yellow liquid with a sweet, warm-spicy, dry, tenacious odour. It blends well with olibanum, ylang ylang, orange, mandarin, benzoin, Peru balsam and in oriental type mixtures.
PRINCIPAL CONSTITUENTS: 1. Leaf – eugenol (80-96 per cent), eugenol acetate, cinnamaldehyde (3 per cent), benzyl benzoate, linalol, safrol among others. 2. Bark - cinnamaldehyde (40-50 per cent), eugenol (4-10 per cent), benzaldehyde, cuminaldehyde, pinene, cineol, phellandrene, furfurol, cymene, linalol, among others.
SAFETY DATA: 1. The leaf oil is relatively nontoxic, though possibly irritant due to cinnamaldehyde. Its major component, eugenol, causes irritation to the mucous membranes: use in moderation. 2. The bark oil is a dermal toxin, irritant and sensitizer; also irritant to the mucous membranes. ‘Should never be used on the skin (one of the most hazardous oils).’.
AROMATHERAPY/HOME: USE Cinnamon bark oil – none. Cinnamon leaf oil:
Skin care: Lice, scabies, tooth and gum care, warts, wasp stings.
Circulation Muscles And Joints: Poor circulation, rheumatism.
Digestive System: Anorexia, colitis, diarrhoea, dyspepsia, intestinal infection, sluggish digestion, spasm.
Genito-Urinary System: Childbirth (stimulates contractions), frigidity, leucorrhoea, metrorrhagia, scanty periods.
Immune System: Chills, colds, ’flu, infectious diseases.
Nervous System: Debility, nervous exhaustion and stress-related conditions.
OTHER USES: Both bark and leaf oils are used for their fragrance and therapeutic actions in toothpastes, nasal sprays, mouthwashes, cough syrups and dental preparations. The leaf oil is used in soaps, cosmetics, toiletries and perfumes. Both are used extensively in food flavouring, especially in alcoholic and soft drinks, including Coca-Cola.... cinnamon
FAMILY: Asteraceae (Compositae)
SYNONYMS: Trilisa odoratissima, Liatris odoratissima, Frasera speciosa, hound’s tongue, deer’s tongue, Carolina vanilla, vanilla leaf, wild vanilla, vanilla trilisa, whart’s tongue, liatrix (oleoresin or absolute).
GENERAL DESCRIPTION: A herbaceous perennial plant distinguished by a naked receptacle and feathery pappus, with large, fleshy, dark green leaves, clasped at the base. When fresh, the leaves have little odour but when dried they acquire a vanilla-like odour, largely due to the coumarin that can be seen in crystals on the upper sides of the leaves.
DISTRIBUTION: Native to eastern USA; gathered on the savannah land between North Carolina and Florida.
OTHER SPECIES: There are several species of deertongue native to America, for example blazing star or prairie pine (Liatris squarrosa), and gayfeather (L. spicata). Not to be confused with the common vanilla (Vanilla planifolia) or with the European hound’s tongue (Cynoglossum officinale), all of which have been used in herbal medicine.
HERBAL/FOLK TRADITION: The roots have been used for their diuretic effects, and applied locally for sore throats and gonorrhoea. It has also been used as a tonic in treating malaria. In folklore the plant is associated with contraception and sterility in women.
ACTIONS: Antiseptic, demulcent, diaphoretic, diuretic, febrifuge, stimulant, tonic.
EXTRACTION: Oleoresin by solvent extraction from the dried leaves.
CHARACTERISTICS: A dark green, heavy, viscous liquid with a rich, herbaceous, new-mown hay scent. It blends well with oakmoss, labdanum, lavandin, frankincense, clove, patchouli and oriental-type fragrances.
PRINCIPAL CONSTITUENTS: Mainly coumarin (1.6 per cent), with dihydrotoumarin and terpenes, aldehydes and ketones.
SAFETY DATA: ‘Coumarin has toxic properties including liver injury and haemorrhages.’. (There is also the possibility of dermal irritation and phototoxicity due to the lactones present.)
AROMATHERAPY/HOME: USE None.
OTHER USES: The oleoresin is used as a fixative and fragrance component in soaps, detergents and perfumery work. Used for flavouring tobacco and; also employed for the isolation of coumarin.... deertongue
FAMILY: Asteraceae (Compositae)
SYNONYMS: Helenium grandiflorum, Aster officinalis, A. helenium, inula, scabwort, alant, horseheal, yellow starwort, elf dock, wild sunflower, velvet dock, ‘essence d’aunée’.
GENERAL DESCRIPTION: A handsome perennial herb up to 1.5 metres high, with a stout stem covered in soft hairs. It has oval pointed leaves which are velvety underneath, large, yellow, daisy-like flowers and large, fleshy rhizome roots.
DISTRIBUTION: Native to Europe and Asia, naturalized in North America. Cultivated in Europe (Belgium, France, Germany) and Asia (China, India). The oil is mainly produced from imported roots in southern France.
OTHER SPECIES: There are several varieties of Inula; the European and Asian species are slightly different having a harsher scent. Other varieties include golden samphire (I. crithmoides) and sweet inula (I. graveolens or I. odora), which share similar properties.
HERBAL/FOLK TRADITION: A herb of ancient medical repute, which used to be candied and sold as a sweetmeat. It is used as an important spice, incense and medicine in the east. It is used in both western and eastern herbalism, mainly in the form of a tea for respiratory conditions such as asthma, bronchitis and whooping cough, disorders of the digestion, intestines and gall bladder and for skin disorders.
Current in the British Herbal Pharmacopoeia as a specific for irritating cough or bronchitis. Elecampane root is the richest source of inulin.
ACTIONS: Alterative, anthelmintic, anti-inflammatory, antiseptic, antispasmodic, antitussive, astringent, bactericidal, diaphoretic, diuretic, expectorant, fungicidal, hyperglycaemic, hypotensive, stomachic, tonic.
EXTRACTION: Essential oil by steam distillation from the dried roots and rhizomes. (An absolute and concrete are also produced in small quantities.)
CHARACTERISTICS: A semi-solid or viscous dark yellow or brownish liquid with a dry, soft, woody, honey-like odour, often containing crystals. It blends well with cananga, cinnamon, labdanum, lavender, mimosa, frankincense, orris, tuberose, violet, cedarwood, patchouli, sandalwood, cypress, bergamot and oriental fragrances.
PRINCIPAL CONSTITUENTS: Mainly sesquiterpene lactones, including alantolactone (or helenin), isolactone, dihydroisalantolactone, dihydralantolactone, alantic acid and azulene.
SAFETY DATA: Non-toxic, non-irritant; however it is a severe dermal sensitizer. In clinical tests it caused ‘extremely severe allergic reactions’ in twenty-three out of twenty-five volunteers. On the basis of these results it is recommended that the oil ‘should not be used on the skin at all’..
AROMATHERAPY/HOME: USE None.
NB In Phytoguide I, sweet inula (I. odora or I. graveolens), a deep green oil, is described as ‘queen of mucolytic essential oils’, having properties as diverse as: ‘anti-inflammatory, hyperthermic, sedative, cardia-regulative, diuretic and depurative’.. It is described as being an excellent oil for the cardiopulmonary zone including asthma, chronic bronchitis and unproductive coughs. This variety of Inula seems to avoid the sensitization problems of elecampane, at least when it is used as an inhalation or by aerosol treatment.
OTHER USES: Alantolactone is used as an anthelmintic in Europe (it is also an excellent bactericide). The oil and absolute are used as fixatives and fragrance components in soaps, detergents, cosmetics and perfumes. Used as a flavour ingredient in alcoholic beverages, soft drinks and foodstuffs, especially desserts.... elecampane
FAMILY: Brassicaceae (Cruciferae)
SYNONYMS: Cochlearia armoracia, A. lapathifolia, red cole, raifort.
GENERAL DESCRIPTION: A perennial plant with large leaves up to 50 cms long, white flowers and a thick whitish tapering root, which is propagated easily.
DISTRIBUTION: Its origins are uncertain, but probably native to eastern Europe. It is now common throughout Russia, Europe and Scandinavia.
OTHER SPECIES: Possibly a cultivated form of Cochlearia macrocarpa, a native of Hungary.
HERBAL/FOLK TRADITION: An extremely stimulating herb, once valued as a household remedy. Its action is similar to mustard seed and it was used for fever, digestive complaints, urinary infections and as a circulatory aid. Good for arthritis and rheumatism. It is still used as a condiment, especially on the Continent.
ACTIONS: Antibiotic, antiseptic, diuretic, carminative, expectorant, laxative (mild), rubefacient, stimulant.
EXTRACTION: Essential oil by water and steam distillation from the broken roots which have been soaked in water. (A resinoid or concrete is also produced by solvent extraction.)
CHARACTERISTICS: A colourless or pale yellow mobile liquid with a sharp, potent odour and having a tear-producing effect.
PRINCIPAL CONSTITUENTS: Allyl isothiocyanate (75 per cent), with phenylethyl isothiocyanate (which is only produced when the plant is bruised or crushed).
SAFETY DATA: Oral toxin, dermal irritant, mucous membrane irritant. ‘This is one of the most hazardous of all essential oils. It should not be used in therapy either externally or internally.’.
AROMATHERAPY/HOME: USE None.
OTHER USES: Mainly used in minute amounts in seasonings, ready-made salads, condiments and canned products.... horseradish
FAMILY: Rutaceae
SYNONYMS: C. limonum, cedro oil.
GENERAL DESCRIPTION: A small evergreen tree up to 6 metres high with serrated oval leaves, stiff thorns and very fragrant flowers. The fruit turns from green to yellow on ripening.
DISTRIBUTION: Native to Asia, probably east India; it now grows wild in the Mediterranean region especially in Spain and Portugal. It is cultivated extensively worldwide in Italy, Sicily, Cyprus, Guinea, Israel, South and North America (California and Florida).
OTHER SPECIES: There are about forty-seven varieties which are said to have been developed in cultivation, such as the Java lemon (C. javanica). The lemon is also closely related to the lime, cedrat (or citron) and bergamot.
HERBAL/FOLK TRADITION: The juice and peel are widely used as a domestic seasoning. It is very nutritious, being high in vitamins A, B and C. In Spain and other European countries, lemon is something of a ‘cure-all’, especially with regard to infectious illness. It was used for fever, such as malaria and typhoid, and employed specifically for scurvy on English ships at sea.
Taken internally, the juice is considered invaluable for acidic disorders, such as arthritis and rheumatism, and of great benefit in dysentery and liver congestion.
ACTIONS: Anti-anaemic, antimicrobial, antirheumatic, antisclerotic, antiscorbutic, antiseptic, antispasmodic, antitoxic, astringent, bactericidal, carminative, cicatrisant, depurative, diaphoretic, diuretic, febrifuge, haemostatic, hypotensive, insecticidal, rubefacient, stimulates white corpuscles, tonic, vermifuge.
EXTRACTION: Essential oil by cold expression from the outer part of the fresh peel. A terpeneless oil is also produced on a large scale (cedro oil).
CHARACTERISTICS: A pale greeny-yellow liquid (turning brown with age), with a light, fresh, citrus scent. It blends well with lavender, neroli, ylang ylang, rose, sandalwood, olibanum, chamomile, benzoin, fennel, geranium, eucalyptus, juniper, oakmoss, lavandin, elemi, labdanum and other citrus oils.
PRINCIPAL CONSTITUENTS: Limonene (approx. 70 per cent), terpinene, pinenes, sabinene, myrcene, citral, linalol, geraniol, octanol, nonanol, citronellal, bergamotene, among others.
SAFETY DATA: Non-toxic; may cause dermal irritation or sensitization reactions in some individuals – apply in moderation. Phototoxic do not use on skin exposed to direct sunlight.
AROMATHERAPY/HOME: USE
Skin care: Acne, anaemia, brittle nails, boils, chilblains, corns, cuts, greasy skin, herpes, insect bites, mouth ulcers, spots, varicose veins, warts.
Circulation muscles and joints: Arthritis, cellulitis, high blood pressure, nosebleeds, obesity (congestion), poor circulation, rheumatism.
Respiratory system: Asthma, throat infections, bronchitis, catarrh.
Digestive system: Dyspepsia.
Immune system: Colds, ’flu, fever and infections.
OTHER USES: Used as a flavouring agent in pharmaceuticals. Extensively used as a fragrance component in soaps, detergents, cosmetics, toilet waters and perfumes. Extensively employed by the food industry in most types of product, including alcoholic and soft drinks.... lemon
FAMILY: Lamiaceae (Labiatae)
SYNONYMS: Lemon balm, common balm, bee balm, sweet balm, heart’s delight, honey plant.
GENERAL DESCRIPTION: A sweet-scented herb about 60 cms high, soft and bushy, with bright green serrated leaves, square stems and tiny white or pink flowers.
DISTRIBUTION: Native to the Mediterranean region, now common throughout Europe, Middle Asia, North America, North Africa and Siberia. Mainly cultivated in France, Spain, Germany and Russia.
OTHER SPECIES: Several varieties, e.g. a variegated leaf type, common in gardens.
HERBAL/FOLK TRADITION: One of the earliest known medicinal herbs – Paracelsus called it the ‘Elixir of Life’. It was associated particularly with nervous disorders, the heart and the emotions. It was used for anxiety, melancholy, etc, and to strengthen and revive the vital spirit. Generally employed for digestive and respiratory complaints of nervous origin such as asthma, indigestion and flatulence. It also helps to regulate the menstrual cycle and promote fertility. Effective remedy for wasp and bee stings. In France the leaves are still used a great deal in pharmaceutical and herbal products. Current in the British Herbal Pharmacopoeia for flatulent dyspepsia, neurasthenia and depressive illness.
ACTIONS: Antidepressant, antihistaminic, antispasmodic, bactericidal, carminative, cordial, diaphoretic, emmenagogue, febrifuge, hypertensive, insect-repellent, nervine, sedative, stomachic, sudorific, tonic, uterine, vermifuge.
EXTRACTION: Essential oil by steam distillation from the leaves and flowering tops.
CHARACTERISTICS: A pale yellow liquid with a light, fresh lemony fragrance. It blends well with lavender, geranium, floral and citrus oils.
PRINCIPAL CONSTITUENTS: Citral, citronellol, eugenol, geraniol, linalyl acetate, among others.
SAFETY DATA: Available information indicates non-toxic. Possible sensitization and dermal irritation: use in low dilutions only. Care must also be taken because this is one of the most frequently adulterated oils. Most commercial so-called ‘melissa’ contains some or all of the following: lemon; lemongrass or citronella.
AROMATHERAPY/HOME: USE
Skin care: Allergies, insect bites, insect repellent. ‘Melissa in very low concentration is a very valuable oil indeed in treating eczema and other skin problems.’.
Respiratory system: Asthma, bronchitis, chronic coughs.
Digestive system: Colic, indigestion, nausea.
Genito-urinary system: Menstrual problems.
Nervous system: Anxiety, depression, hypertension, insomnia, migraine, nervous tension, shock and vertigo.
OTHER USES: Occasionally used in pharmaceutical preparations. Used extensively as a fragrance component in toiletries, cosmetics and perfumes. Employed in most major food categories including alcoholic and soft drinks.... melissa
FAMILY: Poaceae (Gramineae)
SYNONYMS: 1. Andropogon citratus, A. schoenathus, West Indian lemongrass, Madagascar lemongrass, Guatemala lemongrass. 2. A. flexuosus, Cymbopogon flexuosus, East Indian lemongrass, Cochin lemongrass, native lemongrass, British India lemongrass, ‘vervaine Indienne’ or France Indian verbena.
GENERAL DESCRIPTION: A fast-growing, tall, aromatic perennial grass up to 1.5 metres high, producing a network of roots and rootlets that rapidly exhaust the soil.
DISTRIBUTION: Native to Asia, there are two main types: 1. The West Indian lemongrass which is probably native to Sri Lanka, now cultivated mainly in the West Indies, Africa and tropical Asia. Main oil producers include Guatemala and India 2. The East Indian lemongrass, which is native to east India (Travancore, etc.), now mainly cultivated in western India!
OTHER SPECIES: There are several varieties of lemongrass of which the East Indian and the West Indian types are the most common. Chemotypes within each variety are also quite pronounced.
HERBAL/FOLK TRADITION: Employed in traditional Indian medicine for infectious illness and fever; modern research carried out in India shows that it also acts as a sedative on the central nervous system. It is also used as an insecticide and for flavouring food. After the distillation process, the exhausted grass is used locally to feed cattle.
ACTIONS: Analgesic, antidepressant, antimicrobial, antioxidant, antipyretic, antiseptic, astringent, bactericidal, carminative, deodorant, febrifuge, fungicidal, galactagogue, insecticidal, nervine, sedative (nervous), tonic.
EXTRACTION: Essential oil by steam distillation from the fresh and partially dried leaves (grass), finely chopped.
CHARACTERISTICS: 1. A yellow, amber or reddish-brown liquid with a fresh, grassy-citrus scent and an earthy undertone. 2. A yellow or amber liquid with a fresh, grassy-lemony scent, generally lighter than the West Indian type.
PRINCIPAL CONSTITUENTS: 1. Citral (65–85 per cent), myrcene (12–25 per cent), dipentene, methylheptenone, linalol, geraniol, nerol, citronellol and farnesol, among others. 2. Citral (up to 85 per cent), geraniol, methyl eugenol, borneol, dipentene; constituents vary according to type.
SAFETY DATA: Non-toxic, possible dermal irritation and/or sensitization in some individuals – use with care.
AROMATHERAPY/HOME: USE
Skin care: Acne, athlete’s foot, excessive perspiration, insect repellent (fleas, lice, ticks), open pores, pediculosis, scabies, tissue toner.
Circulation muscles and joints: Muscular pain, poor circulation and muscle tone, slack tissue.
Digestive system: Colitis, indigestion, gastro enteritis.
Immune system: Fevers, infectious disease.
Nervous system: Headaches, nervous exhaustion and stress-related conditions.
OTHER USES: Extensively used as a fragrance component in soaps, detergents, cosmetics and perfumes. Employed as a flavour ingredient in most major food categories including alcoholic and soft drinks. Also used for the isolation of citral and for the adulteration of more costly oils such as verbena or melissa.... lemongrass
FAMILY: Lamiaceae (Labiatae)
SYNONYMS: Field mint, Japanese mint.
GENERAL DESCRIPTION: A rather fragile herb with leafy stems up to 60 cms high, lance-shaped leaves and lilac-coloured flowers borne in clustered whorls in the axils of the upper leaves.
DISTRIBUTION: Native to Europe and parts of Asia (Japan and China); naturalized in North America. Major producers of the oil include China, Brazil, Argentina, India and Vietnam.
OTHER SPECIES: There are many varieties and chemotypes of this herb, which is used for large-scale oil production, such as the Chinese type M. arvensis var. glabrata, and the Japanese species M. arvensis var. piperascens.
HERBAL/FOLK TRADITION: It is used therapeutically in many of the same ways as peppermint; the bruised leaves are applied to the forehead to relieve nervous headache. In the East it is used to treat rheumatic pain, neuralgia, toothache, laryngitis, indigestion, colds and bronchitis. In Chinese medicine, it is also employed for relieving earache, treating tumours and some skin conditions.
ACTIONS: Anaesthetic, antimicrobial, antiseptic, antispasmodic, carminative, cytotoxic, digestive, expectorant, stimulant, stomachic.
EXTRACTION: Essential oil by steam distillation from the flowering herb. The oil is usually dementholized since it contains so much menthol that it is otherwise solid at room temperature.
CHARACTERISTICS: Dementholized oil – a colourless or pale yellow liquid with a strong, fresh, bitter-sweet minty odour, somewhat like peppermint.
PRINCIPAL CONSTITUENTS: Menthol (70–95 per cent), menthane (10–20 per cent), pinene, menthyl acetate, isomenthone, thujone, phellandrene, piperitone and menthofuran, among others. Constituents vary according to source.
SAFETY DATA: Non-toxic, non-irritant (except in concentration); may cause sensitization in some individuals. Menthol is a dermal irritant.
AROMATHERAPY/HOME: USE None. Use peppermint in preference, since it is not fractionated like the commercial cornmint oil and has a more refined fragrance.
OTHER USES: Used in some pharmaceutical preparations, such as cough lozenges, herb teas and syrups, mainly in the form of menthol. Extensively employed in soaps, toothpastes, detergents, cosmetics, perfumes and especially industrial fragrances. Used by the food industry especially for flavouring confectionery, liqueurs and chewing gum. However, it is mainly used for the isolation of natural menthol.... mint, cornmint
FAMILY: Brassicaceae (Cruciferae)
SYNONYMS: Sinapsis nigra, B. sinapioides, black mustard.
GENERAL DESCRIPTION: An erect annual up to 3 metres high, with spear-shaped upper leaves, smooth flat pods containing about ten dark brown seeds, and bright yellow cabbage-like flowers.
DISTRIBUTION: Common throughout south eastern Europe, southern Siberia, Asia Minor and North Africa; naturalized in North and South America. Cultivated for its seed and oil in England, Holland, Denmark, Germany and Italy.
OTHER SPECIES: The Russian variety is known as brown mustard or ‘sarepta’ (B. juncea); the white mustard (B. alba) does not contain any essential oil. Also closely related is rape (B. napus) and other local species which are used in India and China.
HERBAL/FOLK TRADITION: The seeds are highly esteemed as a condiment and for their medicinal qualities. They have been used in the East and West to aid the digestion, warm the stomach and promote the appetite, and for cold, stiff or feverish conditions such as colds, chills, coughs, chilblains, rheumatism, arthritis, lumbago and general aches and pains.
ACTIONS: Aperitif, antimicrobial, antiseptic, diuretic, emetic, febrifuge, rubefacient (produces blistering of the skin), stimulant.
EXTRACTION: Essential oil by steam (or water) distillation from the black mustard seeds, which have been macerated in warm water.
CHARACTERISTICS: A colourless or pale yellow liquid with a sharp, penetrating, acrid odour.
PRINCIPAL CONSTITUENTS: Allyl isothiocyanate (99 per cent). NB: Black mustard seed or powder does not contain this constituent, which is only formed by contact with water during the production of the essential oil.
SAFETY DATA: Oral toxin, dermal toxin, mucous membrane irritant. It is considered one of the most toxic of all essential oils.
AROMATHERAPY/HOME: USE None. ‘It should not be used in therapy either externally or internally.’.
OTHER USES: Used in certain rubefacient or counter-irritant liniments. Used extensively by the food industry especially in pickles, seasonings and sauces. Little used as a fragrance component except in cat and dog repellents.... mustard
FAMILY: Lamiaceae (Labiatae)
SYNONYMS: European oregano, wild maqoram, common maqoram, grove marjoram, joy of the mountain, origanum (oil).
GENERAL DESCRIPTION: A hardy, bushy, perennial herb up to 90 cms high with an erect hairy stem, dark green ovate leaves and pinky-purple flowers. A common garden plant with a strong aroma when the leaves are bruised.
DISTRIBUTION: Native to Europe, now cultivated all over the world, including the USA, India and South America; the oil is mainly produced in the USSR, Bulgaria and Italy.
OTHER SPECIES: There is much confusion concerning the exact botanical classification of the marjoram and oregano species. There are over thirty varieties some of which are used to produce essential oils, such as the winter or Greek marjoram O. heracleoticum, the African species O. glandulosum, the Moroccan species O. virens, as well as the Mexican oregano Lippia graveolens or L. palmeri and the Syrian oregano (O. maru). However, most commercial ‘oregano oil’ is derived from the Spanish oregano (Thymus capitatus) and to a lesser degree from the common oregano or wild marjoram – see entries on Spanish oregano and sweet marjoram.
HERBAL/FOLK TRADITION: This is the ‘true’ oregano of the herb garden, which also has a very ancient medical reputation. It has been used as a traditional remedy for digestive upsets, respiratory problems (asthma, bronchitis, coughs, etc), colds and ’flu as well as inflammations of the mouth and throat.
In China it is also used to treat fever, vomiting, diarrhoea, jaundice and itchy skin conditions. The (diluted) oil has been used externally in herbal medicine for headaches, rheumatism, general aches and pains, and applied to stings and bites.
ACTIONS: Analgesic, anthelmintic, antirheumatic, antiseptic, antispasmodic, antitoxic, antiviral, bactericidal, carminative, choleretic, cytophylactic, diaphoretic, diuretic, emmenagogue, expectorant, febrifuge, fungicidal, parasiticide, rubefacient, stimulant, tonic.
EXTRACTION: Essential oil by steam distillation from the dried flowering herb.
CHARACTERISTICS: A pale yellow liquid (browning with age), with a warm, spicy herbaceous, camphoraceous odour. It blends well with lavandin, oakmoss, pine, spike lavender, citronella, rosemary, camphor and cedarwood.
PRINCIPAL CONSTITUENTS: Carvacrol, thymol, cymene, caryophyllene, pinene, bisabolene, linalol, borneol, geranyl acetate, linalyl acetate, terpinene. NB: Constituents are highly variable according to source, but oils classified as ‘oregano’ or ‘oreganum’ have thymol and/or carvacrol as their major components.
SAFETY DATA: Dermal toxin, skin irritant, mucous membrane irritant. Avoid during pregnancy.
AROMATHERAPY/HOME: USE None. ‘Should not be used on the skin at all.’.
OTHER USES: Used as a fragrance component in soaps, colognes and perfumes, especially men’s fragrances. Employed to some extent as a flavouring agent, mainly in meat products and pizzas.... oregano, common
FAMILY: Lamiaceae (Labiatae)
SYNONYMS: T. capitans, Coridothymus capitatus, Satureja capitata, Thymbra capitata, oreganum (oil), Israeli oreganum (oil), Cretan thyme, corido thyme, conehead thyme, headed savory, thyme of the ancients.
GENERAL DESCRIPTION: A perennial creeping herb with a woody stem, small dark green leaves and pink or white flowers borne in clusters.
DISTRIBUTION: Native to the Middle East and Asia Minor; grows wild in Spain. The oil is produced mainly in Spain, Israel, Lebanon, Syria and Turkey.
OTHER SPECIES: Although this herb is strictly a thyme, it serves as the source for most so-called ‘oregano oil’. For other related species see entries on common thyme, common oregano and sweet marjoram; see also Botanical Classification section.
HERBAL/FOLK TRADITION: According to Mrs Grieve the properties and oil of Spanish oregano (Thymus capitatus) are similar to the common thyme (T. vulgaris); it also shares many qualities with the common oregano or wild marjoram (Origanum vulgare).
ACTIONS: See common oregano.
EXTRACTION: Essential oil by steam distillation from the dried flowering tops.
CHARACTERISTICS: A dark brownish-red or purple oil with a strong tarlike, herbaceous, refreshing odour.
PRINCIPAL CONSTITUENTS: Carvacrol, thymol, cymene, caryophyllene, pinene, limonene, linalol, borneol, myrcene, thujone, terpinene.
SAFETY DATA: Dermal toxin, skin irritant, mucous membrane irritant.
AROMATHERAPY/HOME: USE None. ‘Should not be used on the skin at all.’.
OTHER USES: See common oregano.... oregano, spanish
FAMILY: Pinaceae
SYNONYMS: P. mugo, P. montana, P. pumilio, mountain pine, Swiss mountain pine, pine needle (oil).
GENERAL DESCRIPTION: A pyramidal shrub or small tree up to 12 metres high with a black bark, stiff and twisted needles borne in clusters, and brown cones, initially of a bluish hue.
DISTRIBUTION: Native to the mountainous regions of central and southern Europe. The oil is mainly produced in Austria (Tirol), Yugoslavia, Denmark and Italy.
OTHER SPECIES: There are very many species of pine used to produce essential oil from their needles and wood or employed in the production of turpentine. NB: The so-called huon pine (Dacrydium franklinii), the essential oil of which is also a skin irritant, belongs to a different family, the Podcarpaceae. For further details see Scotch pine and the Botanical Classification section.
HERBAL/FOLK TRADITION: A preparation made from the needles has been used internally for bladder, kidney and rheumatic complaints, as a liniment for rheumatism and muscular pain, and as an inhalant for bronchitis, catarrh, colds, etc.
ACTIONS: Analgesic, antimicrobial, antiseptic, antitussive, antiviral, balsamic, diuretic, expectorant, rubefacient.
EXTRACTION: Essential oil by steam distillation from the needles and twigs.
CHARACTERISTICS: A water-white liquid with a very pleasant, balsamic-sweet, spicy-woody scent of good tenacity. This is the favoured pine fragrance for perfumery use due to its unique delicate odour, which blends well with cedarwood, lavandin, rosemary, sage, cananga, labdanum, juniper and other coniferous oils.
PRINCIPAL CONSTITUENTS: Mainly monoterpene hydrocarbons; limonene, pinenes, phellandrene, dipentene, camphene, myrcene and bornyl acetate among others. The unusual scent is believed to be due to its aldehyde content.
SAFETY DATA: Dermal irritant, common sensitizing agent; otherwise non-toxic. It is best avoided therapeutically due to irritant hazards.
AROMATHERAPY/HOME: USE None.
OTHER USES: Used as a fragrance and flavour component in pharmaceutical preparations for coughs and colds, nasal congestion and externally in analgesic ointments and liniments. Extensively employed in soaps, bath preparations, toiletries, cosmetics and perfumes, especially ‘leather’ and ‘woody’ type fragrances. It is also used in most major food categories, alcoholic and soft drinks.... pine, dwarf
FAMILY: Cupressaceae
SYNONYMS: Sabina cacumina, savin (oil).
GENERAL DESCRIPTION: A compact evergreen shrub about 1 metre high (though much taller in the Mediterranean countries), which tends to spread horizontally. It has a pale green bark becoming rough with age, small, dark green leaves and purplish-black berries containing three seeds.
DISTRIBUTION: Native to North America, middle and southern Europe. The oil is produced mainly in Austria (the Tirol), a little in France and Yugoslavia.
OTHER SPECIES: Closely related to the common juniper (J. communis) and other members of the family – see juniper.
HERBAL/FOLK TRADITION: It was used at one time as an ointment or dressing for blisters, in order to promote discharge, and for syphilitic warts and other skin problems. It is rarely administered nowadays because of its possible toxic effects.
ACTIONS: Powerful emmenagogue, rubefacient, stimulant.
EXTRACTION: Essential oil by steam distillation from the twigs and leaves.
CHARACTERISTICS: A pale yellow or olive oily liquid with a disagreeable, bitter, turpentine-like odour.
PRINCIPAL CONSTITUENTS: Sabinol, sabinyl acetate, terpinene, pinene, sabinene, decyl aldehyde, citronellol, geraniol, cadinene and dihydrocuminyl alcohol.
SAFETY DATA: Oral toxin. Dermal irritant. Abortifacient. ‘The oil is banned from sale to the public in many countries due to its toxic effects (nerve poison and blood circulation stimulant).’.
AROMATHERAPY/HOME: USE None. ‘Should not be used in therapy, whether internally or externally.’.
OTHER USES: Occasional perfumery use. Little employed nowadays.... savine
FAMILY: Lamiaceae (Labiatae)
SYNONYMS: Satureia hortensis, Calamintha hortensis, garden savory.
GENERAL DESCRIPTION: An annual herb up to 45 cms high with slender, erect, slightly hairy stems, linear leaves and small, pale lilac flowers.
DISTRIBUTION: Native to Europe, naturalized in North America. Extensively cultivated, especially in Spain, France, Yugoslavia and the USA for its essential oil.
OTHER SPECIES: Closely related to the thyme family, with which it shares many characteristics. There are several different types ‘of savory’ which include S. thymbra, found in Spain, which contains mainly thymol, and the winter savory (S. montana) – see separate entry.
HERBAL/FOLK TRADITION: A popular culinary herb, with a peppery flavour. It has been used therapeutically mainly as a tea for various ailments including digestive complaints (cramp, nausea, indigestion, intestinal parasites), menstrual disorders and respiratory conditions (asthma, catarrh, sore throat). Applied externally, the fresh leaves bring instant relief from insect bites, bee and wasp stings.
‘This kind is both hotter and drier than the winter kind ... it expels tough phlegm from the chest and lungs, quickens the dull spirits in the lethargy.’.
ACTIONS: Anticatarrhal, antiputrescent, antispasmodic, aphrodisiac, astringent, bactericidal, carminative, cicatrisant, emmenagogue, expectorant, fungicidal, stimulant, vermifuge.
EXTRACTION: Essential oil by steam distillation from the whole dried herb. (An oleoresin is also produced by solvent extraction.)
CHARACTERISTICS: A colourless or pale yellow oil with a fresh, herbaceous, spicy odour. It blends well with lavender, lavandin, pine needle, oakmoss, rosemary and citrus oils.
PRINCIPAL CONSTITUENTS: Carvacrol, pinene, cymene, camphene, limonene, phellandrene and borneol, among others.
SAFETY DATA: Dermal toxin, dermal irritant, mucous membrane irritant. Avoid during pregnancy.
AROMATHERAPY/HOME: USE None. ‘Should not be used on the skin at all.’.
OTHER USES: Occasionally used in perfumery work for its fresh herbaceous notes. The oil and oleoresin are used in most major food categories, especially meat products and canned food.... savory, summer
FAMILY: Leguminosae
SYNONYMS: Coumarouna odorata, tonquin bean, Dutch tonka bean.
GENERAL DESCRIPTION: A very large tropical tree with big elliptical leaves and violet flowers, bearing fruit which contain a single black seed or ‘tonka bean’, about the size of a butter bean. The beans, known as ‘rumara’ by the natives, are collected and dried, then soaked in alcohol or rum for twelve to fifteen hours to make them swell. When they are removed from the bath they become dried and shrunken, covered in a whitish powder of crystallized coumann.
The ‘curing’ of the beans is partly a conventional ‘sales promotion’ technique rather than an indication of quality, since the frosted appearance has come to be expected of the product.
DISTRIBUTION: Native to South America, especially Venezuela, Guyana and Brazil; cultivated in Nigeria and elsewhere in West Africa. Most beans come from South America after ‘curing’, to be processed in Europe and the USA.
OTHER SPECIES: There are many species of Dipteryx which produce beans suitable for extraction.
HERBAL/FOLK TRADITION: In Holland the fatty substance from the beans is sold as ‘tarquin butter’, which used to be used as an insecticide against moth in linen cupboards. ‘The fluid extract has been used with advantage in whooping cough, but it paralyses the heart if used in large doses.’.
ACTIONS: Insecticidal, narcotic, tonic (cardiac).
EXTRACTION: A concrete and absolute by solvent extraction from the ‘cured’ beans.
CHARACTERISTICS: The absolute is a semi-solid yellow or amber mass with a very rich, warm and sweet herbaceous-nutty odour. It blends well with lavender, lavandin, clary sage, styrax, bergamot, oakmoss, immortelle and citronella.
PRINCIPAL CONSTITUENTS: Mainly coumarin (20–40 per cent) in the absolute.
SAFETY DATA: Oral and dermal toxin, due to high coumarin content.
AROMATHERAPY/HOME: USE None.
OTHER USES: Used to a limited extent as a pharmaceutical masking agent. The absolute is employed as a fixative and fragrance component in oriental, new-mown hay and chypres-type perfumes. It is no longer used as a flavouring (due to the coumarin ban in many countries), though it is still used to flavour tobacco.... tonka
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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