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Botanical Name: Thymus Vulgaris (LINN.)
Family: N.O. Labiatae
Thyme (Thymus) (pronounced “time”) is a genus of about 350 species of aromatic perennial herbaceous plants and sub-shrubs to 40 cm tall, in the family Lamiaceae and native to Europe, North Africa and Asia. A number of species have different chemotypes. The stems tend to be narrow or even wiry; the leaves are evergreen in most species, arranged in opposite pairs, oval, entire, and small, 4-20 mm long. The flowers are in dense terminal heads, with an uneven calyx, with the upper lip three-lobed, and the lower cleft; the corolla is tubular, 4-10 mm long, and white, pink or purple…..click & see the pictures
Thymus species are used as food plants by the larvae of some Lepidoptera insect species including Chionodes distinctella and the Coleophora case-bearers C. lixella, C. niveicostella, C. serpylletorum and C. struella (the latter three feed exclusively on Thymus).
Thymus vulgaris (Common Thyme or Garden Thyme) is a commonly used culinary herb. It is a Mediterranean perennial which is best suited to well-drained soils and enjoys full sun.
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Thymus herba-barona (Caraway Thyme) is used both as a culinary herb and a groundcover, and has a strong caraway scent.
Thymus — citriodorus (Citrus Thyme; hybrid T. pulegioides — T. vulgaris) is also a popular culinary herb, with cultivars selected with flavours of various Citrus fruit (lemon thyme, etc.)
Thymus pseudolanuginosus (Woolly Thyme) is not a culinary herb, but is grown as a ground cover.
Thymus serpyllum (Wild Thyme) is an important nectar source plant for honeybees. All thyme species are nectar sources, but wild thyme covers large areas of droughty, rocky soils in southern Europe (Greece is especially famous for wild thyme honey) and North Africa, as well as in similar landscapes in the Berkshire Mountains and Catskill Mountains of the northeastern US.
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Oil of Thyme is the important commercial product obtained by distillation of the fresh leaves and flowering tops of T. vulgaris. Its chief constituents are from 20 to 25 per cent of the phenols Thymol and Carvacrol, rising in rare cases to 42 per cent. The phenols are the principal constituents of Thyme oil, Thymol being the most valuable for medicinal purposes, but Carvacrol, an isomeric phenol, preponderate in some oils. Cymene and Pinene are present in the oil, as well as a little Menthone. Borneol and Linalol have been detected in the high boiling fractions of the oil and a crystalline body, probably identical with a similar body found in Juniper-berry oil.
Cultivation and uses:
Thyme is widely cultivated as a herb, grown for its strong flavour, which is due to its content of thymol (Huxley 1992). It retains its flavour on drying better than many other herbs.
You can start thyme from seeds to get a wider selection of varieties. Most nurseries carry transplants in spring and summer. It prefers a sandy, dry soil and plenty of sun. If your soil is acidic, add some lime. If you live in a very cold climate, protect the plants in winter by mulching heavily. Once established, the only care will be regular pruning of the plants and removal of dead flowers and pruning to remove old wood.
Sow about the middle of March or early April, in dry, mild weather, moderately thin, in shallow drills about 1/2 inch deep, and 8 or 9 inches apart, in good, light soil, in a warm position. Cover in evenly with the soil. Some of the plants may remain where planted, after a thinning for early use, others plant out in the summer. Thyme thrives best with lots of room to spread in. It is well to make new beds annually. Selfsown plants will answer for this where found.
Leaves can be harvested for fresh use throughout the summer, but the flavor is best just before flowering. To dry, cut the stems just as the flowers start to open and hang in small bunches. Harvest sparingly the first year.
In traditional Jamaican childbirth practice, thyme tea is given to the mother after delivery of the baby. Its oxytocin-like effect causes uterine contractions and more rapid delivery of the placenta but this was said by Sheila Kitzinger to cause an increased prevalence of retained placenta.
Thyme in the Kitchen
Thyme is a basic ingredient in French and Italian cuisines, and in those derived from them. It is also widely used in Caribbean cuisine.Thyme is a basic spice that has a place in most every kitchen.
Satureja thymbra, which is used in Spain as a spice and is closely allied to the Savouries grown in the English kitchen garden, yields an oil containing about 19 per cent of Thymol. Other species of Satureja contain Carvacrol.
Thyme is principally in request for culinary requirements, for its use in flavouring stuffings, sauces, pickles, stews, soups, jugged hare, etc. The Spaniards infuse it in the pickle with which they preserve their olives.
Thyme has a strong piquant or lemony flavor. For fresh use, the flavor is best just before flowering.Thymol is also a preservative of meat.
Enhance the flavor of meat, fish and poultry dishes with thyme.
For chicken and fish marinades, bruise fresh sprigs of thyme and tarragon, and combine with red-wine vinegar and olive oil.
Use in herb butters and cottage cheese.
Medicinal & Other Uses:
It is safe to use thyme as a seasoning during pregnancy, but strong medicinal doses should be avoided if there is any possibility that you are pregnant.
It is —Antiseptic, antispasmodic, tonic and carminative.
The pounded herb, if given fresh, from 1 to 6 OZ. daily, mixed with syrup, has been employed with success as a safe cure for whooping cough. An infusion made from 1 OZ. of the dried herb to 1 pint of boiling water, sweetened with sugar or honey, is also used for the same purpose, as well as in cases of catarrh and sore throat, given in doses of 1 or more tablespoonsful, several times daily. The wild plant may be equally well used for this.
Thyme tea will arrest gastric fermentation. It is useful in cases of wind spasms and colic, and will assist in promoting perspiration at the commencement of a cold, and in fever and febrile complaints generally.
In herbal medicine, Thyme is generally used in combination with other remedies.
Fluid extract, 1/2 to 1 drachm. Oil, 1 to 10 drops.
According to Culpepper, Thyme is:’a noble strengthener of the lungs, as notable a one as grows, nor is there a better remedy growing for hooping cough. It purgeth the body of phlegm and is an excellent remedy for shortness of breath. It is so harmless you need not fear the use of it. An ointment made of it takes away hot swellings and warts, helps the sciatica and dullness of sight and takes away any pains and hardness of the spleen: it is excellent for those that are troubled with the gout and the herb taken anyway inwardly is of great comfort to the stomach.’
Gerard says it will ‘cure sciatica and pains in the head,’ and is healing in leprosy and the falling sickness.
Oil of Thyme is employed as a rubefacient and counter-irritant in rheumatism, etc.
Thyme enters into the formula for Herb Tobacco, and employed in this form is good for digestion, headache and drowsiness.
In Perfumery, Essence of Thyme is used for cosmetics and rice powder. It is also used for embalming corpses.
The dried flowers have been often used in the same way as lavender, to preserve linen from insects.
All the different species of Thyme and Marjoram yield fragrant oils extensively used by manufacturing perfumers for scenting soaps. When dried and ground, they enter into the composition of sachet powders.
THYMOL, a most valuable crystalline phenol, is the basis of the fragrant volatile Essence of Sweet Thyme, and is obtainable from Carum copticum, Monarda punctata and various other plants, as well as from T. vulgaris, being present to the extent of from 20 to 60 per cent in the oils which yield it. Ajowan oil, its principal commercial source (from the seeds of C. copticum) contains from 40 to 55 per cent of Thymol; the oil of T. vulgaris contains from 20 to 30 per cent as a rule of Thymol and Carvacrol in varying proportions, while the oil of M. punctata contains 61 per cent of Thymol.
The extraction of Thymol is effected by treating the oil with a warm solution of sodium hydroxide: this alkali dissolves the Thymol, and on dilution with hot water the undissolved oil (terpenes, etc.) rises to the surface. The alkaline thymol compound is decomposed by treatment with hydrochloric acid and subsequent crystallization of the oily layer into large, oblique, prismatic crystals. Thymol (methyl-propyl-phenol) has been prepared synthetically.
When treated with caustic potash and iodine, it yields iodo-thymol, commonly known as ‘Aristol.’
Camphor of Thyme was noticed first by Neumann, apothecary to the Court at Berlin in 1725. It was called Thymol and carefully examined in 1853 by Lallemand and recommended instead of Phenol (carbolic acid) in 1868 by Bouilhon, apothecary, and Paquet, M.D., of Lille.
Thymol is a powerful antiseptic for both internal and external use; it is also employed as a deodorant and local anaesthetic. It is extensively used to medicate gauze and wool for surgical dressings. It resembles carbolic acid in its action, but is less irritant to wounds, while its germicidal action is greater. It is therefore preferable as a dressing and during recent years has been one of the most extensively used antiseptics.
In respect of its physiological action, Thymol appears to stand between carbolic acid and oil of turpentine. Its action as a disinfectant is more permanent and at the same time more powerful than that of carbolic acid. It is less irritating to the skin, does not act as a caustic like carbolic acid, and is a less powerful poison to mammals. In the higher animals it acts as a local irritant and anaesthetic to the skin and mucous membrane. It is used as an antiseptic lotion and mouth wash; as a paint in ringworm, in eczema, psoriasis, broken chilblains, parasitic skin affections and burns; as an ointment, halfstrength, perfumed with lavender, to keep off gnats and mosquitoes. Thymol in oily solution is applied to the respiratory passages by means of a spray in nasal catarrh, and a spirituous solution may be inhaled for laryngitis, bronchial affections and whooping cough. It is most useful against septic sore throat, especially during scarlet-fever. Internally, it is given in large doses, to robust adults, in capsules, as a vermifuge, to expel parasites, especially the miner’s worm, and it has also been used in diabetes and vesical catarrh.
Thymol finds no place in perfumery, but the residual oil after extracting the crystalline Thymol from Ajowan oil, which amounts to about 50 per cent of the original oil, is generally sold as a cheap perfume for soap-making and similar purposes, under the name of ‘Thymene.’
Till the outbreak of war, Thymol was manufactured almost exclusively in Germany. One of the chief commercial sources of Thymol, Ajowan seed (C. copticum), is an annual umbelliferous plant, a kind of caraway, which is abundant in India, where it is widely cultivated for the medicinal properties of its seeds. Almost the whole of the exports of Ajowan seed from India, Egypt, Persia and Afghanistan went to Germany for the distillation of the oil and extraction of Thymol, the annual export of the seed from India being about 1,200 tons, from which the amount of Thymoi obtainable was estimated at 20 tons. On the outbreak of war the export of Ajowan seed dropped to 2 tons per month, and there was a universal shortage of Thymol, just when it was urgently needed for the wounded.
As a result of investigations by the Imperial Institute, Thymol is now being made by several firms in this country, and the product is equal in quality and appearance to that previously imported from Germany. In India, also, good samples were obtained as a result of experiments conducted in Government laboratories in the early months of the War, and by the close of 1915 companies were already established at Dehra and Calcutta for its manufacture on a large scale. In the two years ending June, 1919, as much as 10,500 lb. of Thymol were exported from Calcutta.
Several other plants can be utilized as sources of Thymol, although none yield such high percentages as Ajowan seed. The following new sources of Thymol were suggested when the scarcity of the valuable antiseptic made itself so severely felt on curtailment of Continental supplies: Garden Thyme and Wild Thyme (T. vulgaris and serpyllum), American Horse Mint (M. punctata), Cunila mariana, Mosla japonica, Origanum hirtum, Ocimim viride and Satureja thymbra.
The oil of Thyme obtained by distilling the fresh-flowering herb of T. vulgaris is already an article of commerce, and contains varying amounts of Thymol, but the actual amount present is not very high, varying, as already stated, from 20 to 25 per cent, only in very rare cases amounting to more; and the methods of separation in order to obtain a pure compound are necessarily more complicated than in the manufacture from Ajowan oil.
The American Horsemint (M. punctata), native to the United States and Canada, seems likely to prove a more valuable source of Thymol than T. vulgaris. It yields from 1 to 3 per cent of a volatile oil, which contains a large proportion of Thymol, up to 61 per cent having been obtained; Carvacrol also appears to be a constituent. The oil has a specific gravity of 0.930 to 0.940, and on prolonged standing deposits crystals of Thymol.
Another species also found in America (M. didyma) (called also ‘Oswego tea’ from the use sometimes made of its leaves in America) is said to yield an oil of similar composition, though not to the same degree, and so far M. punctata is considered the only plant indigenous to North America which can be looked upon as a fruitful source of Thymol, though from C. mariana, also found in North America, an oil is derived – Oil of Dittany – which is stated to contain about 40 per cent of phenols, probably Thymol.
Thymol is also contained in the oil distilled from the dry herb of Mosla japonica, indigenous to Japan. It is stated to yield about 2.13 per cent of oil, containing about 44 per cent of Thymol.
A new source of Thymol is also Ocimum viride, the ‘Mosquito Plant’ of West Africa and the West Indies, which yield 0.35 to 1.2 of oil from which 32 to 65 per cent of Thymol can be extracted. This plant occurs wild on all soils in every part of Sierra Leone, and is also grown in the Seychelles. In Sierra Leone it bears the name of ‘Fever-plant’ on account of its febrifugal qualities; a decoction is made from the leaves.
The Origanum oils shipped from Trieste and Smyrna generally contain only Carvacrol, the only species yielding Thymol exclusively and to a considerable degree being Origanum hirtum, which may be regarded as a promising source of Thymol.
The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to consult with your own health care provider.
Source:www.botanical.com and en.wikipedia.org