The evergreen clove tree originated in the Moluccas, the ‘Spice Islands’, but has now been introduced into most tropical countries and Madagascar, Zanzibar and Tanzania dominate the world trade. Cloves grow best near the sea, thus the preponderance of island cultivation. Clove trees are fairly small, growing naturally up to 9 m (30 ft), but usually kept at a more accessible height, 5-6 m (16 ½ -20 ft), for cropping. They are conical, looking a little like laurels, but the leaves are longer than laurel, brighter green and although as shiny, they have visible dots containing the aromatic substances. These are released if you bruise or crush the leaves. The trunk, covered with a smooth greyish bark, divides quite low into large branches, at the end of which the crimson flowers grow ¬or would, if they were allowed to reach that stage. The cloves are the unopened, long, yellowish-green flower buds which appear at the end of the rainy season. When these turn pink, just before opening, they are picked by hand or beaten from the tree. The flowers are then dried in the sun, or gently over heat, for a few days until they are the familiar dark brown colour of the spice.The clove tree does not produce the spice until aged about five years, and can carry on increasing its yield until it is about 20 years old. The yield of a mature tree is generally around 3 – 4 kg (6 ½ – 8 ¾ lb) fresh buds. When these are dried, the weight reduces to about 1 kg (2 1/4 lb), and in turn this yields about 15 – 20 per cent essential oil. The contents of one little 150 ml (1/4 pint) bottle represents the output of one tree – a very small quantity for all the work involved!In the middle of the rainy season, the hot humid atmosphere disperses the fragrance of the clove trees all over the islands where they grow. The lack of epidemics on Penang was attributed to the medicinal scents from the tree (clove is a very strong antiseptic). Significantly, after the Dutch destroyed the clove trees in the early seventeenth century island inhabitants began to suffer from disease, and many died.The Greeks called the tree ‘caryophyllum’, meaning ‘leaf of walnut tree’ and this derived through Arabic to ‘girofle’, part of the French name for the spice, clou de girofle. Clou is the French for nail, deriving from the Latin clavus, which is also the origin of the English word (the dried buds look like little nails). Cloves were also known to the Ancient Egyptians, Greeks and Romans.Pliny praised cloves, as did the great Roman doctor, Alexander Trallianus. St Hildegarde, in her book Morborum Causae et Gurae, wrote that cloves were included in treatments for headaches, migraines, deafness after a cold, and dropsy. She advised that cloves would warm people feeling the cold, and cool down those who felt hot. During the Renaissance, pomanders were made with cloves to keep epidemics and plague at bay.CLOVE ESSENTIAL OILClove oil is distilled from the leaves and unripe fruit. Some salt is added to the water to raise the boiling temperature, and the clove buds must be distilled over and over again to extract all the essential oil. This is colorless with a little tinge of yellow when freshly distilled: as it matures it turns a dark brown. It has a spicy vanilla scent, peppery with a little note of carnation.The principal constituents: The largest part are the phenols (70 – 80 per cent), particularly eugenol. This was only isolated by Bonastre in 1827, and is one of the most antiseptic of the phenol family, three to four times stronger than arry other. Further constituents are acetyleugenol (which gives the specific fragrance), benzoic acid, benzyl benzoate, furfurol, sesquiterpene (B-caryophyllene) and vanillin.Dangers: Clove oil is often adulterated with a vegetable oil (usually palm) and oil of pimento berries and leaves. Sometimes the adulterant is copaiba, an oil made from the gum resin of a Brazilian balsam tree, Copaifera officinalis. This is a great pity, as the therapeutic values are only present in the absolutely pure essential oil. Because of the eugenol content the oil can corrode metal.USESThe old texts all seem to agree on the many therapeutic properties of clove – it is a stimulant and has stomachic, expectorant, sedative, carminative, antispasmodic and digestive qualities. It helps flatulence, stimulates digestion and restores appetite, so is good for convalescence.It is a general tonic for both physical and intellectual weakness; and for those suffering from frigidity.Its principal therapeutic value, though, is antiseptic because of the high proportion of eugenol.This is used for intestinal parasites, and for prevention of virus infections.It is good for the immune system, and particularly effective in mouth and tooth infections.When I am under physical or mental strain, or simply tired, I suck a clove several times a day. It has an agreeable taste, and acts as a relaxant.Sucking cloves is a particularly good idea for those trying to give up smoking.The dental value of cloves is well known. They are antiseptic, but have sedative and minor anesthetic properties too (a sucked clove will slightly numb your tongue). If you have a toothache, either suck a clove on the side of the sore tooth, or apply a cotton bud with a drop of the essential oil to the tooth. This will give you relief until you get to the dentist, and also helps to keep the mouth clean because of the antiseptic effect. Never use too much of the oil, and don’t leave it on the tooth (on a piece of cotton wool, say) as your gums could begin to flake.A good mouthwash can be made for halitosis: boil a few cloves in a little water for 5 minutes, let it cool down, then add a few mint leaves and rinse and gargle with the strained liquid.For rheumatic pains, mix together 25 ml (1 fl oz) castor oil, 5 drops each of juniper and wheatgerm oils, and 5 drops clove oil in a brown bottle. Rub on the affected parts and keep warm.In popular medicine, an infusion of cloves was given to activate labor after the first pains were felt. This could also ease the pains.In cookeryCloves can be used in cooking for their therapeutic values in a variety of ways, although always with care as they can dominate. A single clove can be stuck into an onion to flavour a stock or bread sauce, or added to a meat or chicken dish to strengthen and enrich its flavor. A boiled meat dish should always have a few cloves in the cooking water, and a clove plus a clove of garlic inserted into the end of a leg of lamb before roasting greatly adds to the flavor. Meat marinades should include cloves as well. Onions cooked with cloves become sweeter and the clove aroma blends very interestingly with the onion. Clove also perfumes the classic German sauerkraut. Cloves are a constituent of many garam masalas, and flavor curries and rice dishes; they are also one of the Chinese five spices.The flavour of cloves goes particularly well with apples: sweet apple pies, or the apple sauce to accompany pork.Many drinks benefit from cloves, particularly spicy, hot mulled wines.Many local liqueurs use cloves: that from Grenobles called ‘Nossolio’ or ‘Merisat’, and the ‘Tafia’ of Martinique and Guadaloupe.CLOVE SOUP Serves 4This ‘soup’ should be taken when minor discomforts start to appear at the beginning of winter – colds, sore throats or snuffles. As soon as any symptoms are felt, make and drink this concoction.600 ml (1 pint) beef stock2 onions, peeled and thinly sliced1 bay leaf6 clovessalt to tastePut all the ingredients in a pan, bring to the boil, then simmer for 30 minutes. Remove the cloves and bay leaf, and serve hot.Other usesThe classic way to use cloves is to stick them into an orange for a pomander to sweeten the wardrobe and keep moths away. This is an interpretation of the anti-plague properties utilized in the Middle Ages.Whole or ground cloves can be included in potpourris.The oil is used a great deal in perfumery – to recreate the smell of carnations - and in soaps and bath salts.In the Indonesian islands – reputedly the consumers of half the world’s output – tobacco and cigarettes are perfumed with cloves.It is said that courtiers at the Han court in China in the second century BC would suck cloves to sweeten their breath when appearing before the emperor. If not in deference to Chinese emperors, eugenol, the principal constituent of clove oil, is still used in some brands of mouthwash.