Lavandula
Lavandula
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| Lavender | |
|---|---|
 | |
| Lavender flowers with bracts | |
Scientific classification  | |
| Kingdom: | Plantae |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
| Order: | Lamiales |
| Family: | Lamiaceae |
| Subfamily: | Nepetoideae |
| Tribe: | Ocimeae |
| Genus: | Lavandula L. |
Type species | |
Lavandula spica L. | |
Synonyms[1] | |
| |
Lavandula (common name lavender) is a genus of 47 known species of flowering plants in the mint family, Lamiaceae. It is native to the Old World and is found from Cape Verde and the Canary Islands, Europe across to northern and eastern Africa, the Mediterranean, southwest Asia, China (Plectranthus mona lavender) to southeast India.[2] Many members of the genus are cultivated extensively in temperate climates as ornamental plants for garden and landscape use, for use as culinary herbs, and also commercially for the extraction of essential oils.[3] The most widely cultivated species, Lavandula angustifolia, is often referred to as lavender, and there is a color named for the shade of the flowers of this species.
Contents
1 Description
2 Nomenclature and taxonomy
3 Etymology
4 Cultivation
5 Lavender oil
6 Culinary use
6.1 Use of the buds
6.2 Use of the greens
6.3 In honey
6.4 Culinary history
7 Research
8 Herbalism
9 Health precautions
10 Other uses
11 In history and culture
12 Taxonomic table
13 Gallery
14 References
15 Further reading
16 External links
Description[edit]
The genus includes annual or short-lived herbaceous perennial plants, and shrub-like perennials, subshrubs or small shrubs.[4]
Leaf shape is diverse across the genus. They are simple in some commonly cultivated species; in other species they are pinnately toothed, or pinnate, sometimes multiple pinnate and dissected. In most species the leaves are covered in fine hairs or indumentum, which normally contain the essential oils.[4]
Flowers are borne in whorls, held on spikes rising above the foliage, the spikes being branched in some species. Some species produce coloured bracts at the apices. The flowers may be blue, violet or lilac in the wild species, occasionally blackish purple or yellowish. The calyx is tubular. The corolla is also tubular, usually with five lobes (the upper lip often cleft, and the lower lip has two clefts).[4][5]
Nomenclature and taxonomy[edit]
Lavandula stoechas, L. pedunculata and L. dentata were known in Roman times.[6] From the Middle Ages onwards, the European species were considered two separate groups or genera, Stoechas (L. stoechas, L. pedunculata, L. dentata) and Lavandula (L. spica and L. latifolia), until Linnaeus combined them. He only recognised five species in Species Plantarum (1753), L. multifida and L. dentata (Spain) and L. stoechas and L. spica from Southern Europe. L. pedunculata was included within L. stoechas.
By 1790, L. pinnata and L. carnosa were recognised. The latter was subsequently transferred to Anisochilus. By 1826 Frédéric Charles Jean Gingins de la Sarraz listed 12 species in three sections, and by 1848 eighteen species were known.[6]
One of the first modern major classifications was that of Dorothy Chaytor in 1937 at Kew. The six sections she proposed for 28 species still left many intermediates that could not easily be assigned. Her sections included Stoechas, Spica, Subnudae, Pterostoechas, Chaetostachys and Dentatae. However all the major cultivated and commercial forms resided in the Stoechas and Spica sections. There were four species within Stoechas (Lavandula stoechas, L. dentata, L. viridis and L. pedunculata) while Spica had three (L. officinalis (now L. angustifolia), L. latifolia and L. lanata). She believed that the garden varieties were hybrids between true lavender L. angustifolia and spike lavender (L. latifolia).
[7]
More recently, work has been done by Upson and Andrews, and currently Lavandula is considered to have three subgenera.
- Subgenus Lavandula is mainly of woody shrubs with entire leaves. It contains the principal species grown as ornamental plants and for oils. They are found across the Mediterranean region to northeast Africa and western Arabia.
- Subgenus Fabricia consists of shrubs and herbs, and it has a wide distribution from the Atlantic to India. It contains some ornamental plants.
- Subgenus Sabaudia constitutes two species in the southwest Arabian peninsula and Eritrea, which are rather distinct from the other species, and are sometimes placed in their own genus Sabaudia.
In addition, there are numerous hybrids and cultivars in commercial and horticultural usage.[4]
Etymology[edit]
The English word lavender is generally thought to be derived from Old French lavandre, ultimately from the Latin lavare (to wash), referring to the use of infusions of the plants.[8] The botanic name Lavandula as used by Linnaeus is considered to be derived from this and other European vernacular names for the plants. However it is suggested that this explanation may be apocryphal, and that the name may actually be derived from Latin livere, "blueish".[9]
The names widely used for some of the species, "English lavender", "French lavender" and "Spanish lavender" are all imprecisely applied. "English lavender" is commonly used for L. angustifolia, though some references say the proper term is "Old English Lavender".[10] The name "French lavender" may be used to refer to either L. stoechas or to L. dentata. "Spanish lavender" may be used to refer to L. stoechas, L. lanata or L. dentata.
Cultivation[edit]
A honey bee on a lavender flower
The most common form in cultivation is the common or English lavender Lavandula angustifolia (formerly named L. officinalis). A wide range of cultivars can be found. Other commonly grown ornamental species are L. stoechas, L. dentata, and L. multifida (Egyptian lavender).
Because the cultivated forms are planted in gardens worldwide, they are occasionally found growing wild as garden escapes, well beyond their natural range. Such spontaneous growth is usually harmless, but in some cases Lavandula species have become invasive. For example, in Australia, Lavandula stoechas has become a cause for concern; it occurs widely throughout the continent, and has been declared a noxious weed in Victoria since 1920.[11] It also is regarded as a weed in parts of Spain.[12]
Lavenders flourish best in dry, well-drained, sandy or gravelly soils in full sun.[13] All types need little or no fertilizer and good air circulation. In areas of high humidity, root rot due to fungus infection can be a problem. Organic mulches can trap moisture around the plants' bases, encouraging root rot. Gravelly materials such as crushed rocks give better results.[14] It grows best in soils with a pH between 6 and 8.[15]
Most lavender is hand-harvested, and harvest times vary depending on intended use.[15]
Lavender oil[edit]
Commercially, the plant is grown mainly for the production of essential oil of lavender. This has antiseptic[16][17] and anti-inflammatory[18] properties, and can be used as a natural mosquito repellent.[19] These extracts are also used as fragrances for bath products.
English lavender (Lavandula angustifolia) yields an essential oil with sweet overtones, and can be used in balms, salves, perfumes, cosmetics, and topical applications. Lavandin, Lavandula × intermedia (also known as Dutch lavender), yields a similar essential oil, but with higher levels of terpenes including camphor, which add a sharper overtone to the fragrance.
The lavandins Lavandula × intermedia are a class of hybrids of L. angustifolia and L. latifolia.[20] The lavandins are widely cultivated for commercial use, since their flowers tend to be bigger than those of English lavender and the plants tend to be easier to harvest, but lavandin oil is regarded by some to be of a lower quality than that of English lavender, with a perfume less sweet.[21]
Culinary use[edit]
Lavender-flavored cupcakes
Culinary lavender is usually English lavender, the most commonly used species in cooking (L. angustifolia 'Munstead'). As an aromatic, it has a sweet fragrance with a taste of lemon or citrus notes.[22] It is used as a spice or condiment in pastas, salads and dressings, and desserts.[23][24] Their buds and greens are used in teas, and their buds, processed by bees, are the essential ingredient of monofloral honey.[25]
Use of the buds[edit]
For most cooking applications the dried buds, which are also referred to as flowers, are used. Lavender greens have a more subtle flavour when compared to rosemary.[26]
The potency of the lavender flowers increases with drying which necessitates more sparing use to avoid a heavy, soapy aftertaste. Chefs note to reduce by two-thirds the dry amount in recipes which call for fresh lavender buds.[27][22]
Lavender buds can amplify both sweet and savory flavors in dishes, and are sometimes paired with sheep's-milk and goat's-milk cheeses. Lavender flowers are occasionally blended with black, green, or herbal teas. Lavender flavours baked goods and desserts, pairing especially well with chocolate. In the United States, both lavender syrup and dried lavender buds are used to make lavender scones and marshmallows.[28][29]
Lavender buds are put into sugar for two weeks to allow the essential oils and fragrance to transfer; then the sugar itself is used in baking. Lavender can be used in breads where recipes call for rosemary. Lavender can be used decoratively in dishes or spirits, or as a decorative and aromatic in a glass of champagne. Lavender is used in savory dishes, giving stews and reduced sauces aromatic flair. It is also used to scent flans, custards, and sorbets.[22]
Use of the greens[edit]
The greens are used similarly to rosemary or combined with rosemary to flavour meat and vegetables in savory dishes. They can also be used to make a tea that is milder than teas made with the flowers.[30]
In honey[edit]
The flowers yield abundant nectar, from which bees make a high-quality honey. Monofloral honey is produced primarily around the Mediterranean, and is marketed worldwide as a premium product. Flowers can be candied and are sometimes used as cake decorations. It is also used to make "lavender sugar".[25]
Culinary history[edit]
Lavender was introduced into England in the 1600s. It is said that Queen Elizabeth prized a lavender conserve (jam) at her table, so lavender was produced as a jam at that time, as well as used in teas both medicinally and for its taste.[22]
Lavender was not used in traditional southern French cooking at the turn of the 20th century. It does not appear at all in the best-known compendium of Provençal cooking, J.-B. Reboul's Cuisinière Provençale.[31] French lambs have been allowed to graze on lavender as it is alleged to make their meat more tender and fragrant.[22]
In the 1970s, a blend of herbs called herbes de Provence was invented by spice wholesalers, where culinary lavender is added to the mixture in the North American version of the spice blend.[32]
Today, lavender recipes are in use in most parts of the world.
Research[edit]
Bunches of lavender for sale, intended to repel insects
Major constituents of lavender oil include linalool (26%) caryophyllene (8%).[33] The essential oil was used in hospitals during World War I.[13]
Lavender oil is under preliminary research for its possible effect in alleviating anxiety and sleep disturbances.[34] High-quality clinical research generally has not been done to conclude if there are effects of lavender oil on anxiety.[35]
Herbalism[edit]
The German scientific committee on traditional medicine, Commission E, reported uses of lavender flower in practices of herbalism, including its use for restlessness or insomnia, Roehmheld's syndrome, intestinal discomfort, and cardiovascular diseases, among others.[36]
Health precautions[edit]
The U.S. National Institutes of Health (NIH) states that lavender is considered likely safe in food amounts and possibly safe in medicinal amounts. NIH does not recommend the use of lavender while pregnant or breast-feeding because of lack of knowledge of its effects. It recommends caution if young boys use lavender oil because of possible hormonal effects leading to gynecomastia[37][38], and states that lavender may cause skin irritation and could be poisonous if consumed by mouth.[39]
A 2005 review on lavender essential oil stated that "Lavender is traditionally regarded as a 'safe' oil and, although it was recently reported that lavender oil, and its major constituent linalyl acetate, are toxic to human skin cells in vitro, contact dermatitis to lavender oil appears to occur at only a very low frequency."[40] There are two reports on a total of six cases of gynecomastia in prepubertal boys who were exposed to topical lavender essential oil.[41][42]
A 2007 study examined the relationship between various fragrances and photosensitivity, stating that lavender is known "to elicit cutaneous photo-toxic reactions", but does not induce photohaemolysis.[43]
Other uses[edit]
Lavender products for sale at the San Francisco Farmers Market.
Flower spikes are used for dried flower arrangements. The fragrant, pale purple flowers and flower buds are used in potpourris. Lavender is also used extensively as herbal filler inside sachets used to freshen linens. Dried and sealed in pouches, lavender flowers are placed among stored items of clothing to give a fresh fragrance and to deter moths. Dried lavender flowers have become recently popular for wedding confetti. Lavender is also popular in scented waters and sachets.
Lavender greens can be used in craft or modelling projects, such as the creation of miniature topiary or trees.[44]
In history and culture[edit]
The ancient Greeks called the lavender herb nardus, after the Syrian city of Naarda (possibly the modern town of Dohuk, Iraq). It was also commonly called nard.[45] The species originally grown was L. stoechas.[4]
Lavender was one of the holy herbs used in the biblical Temple to prepare the holy essence, and nard ('nerd' in Hebrew) is mentioned in the Song of Solomon (4,14)[46]
nard and saffron,
with henna and nard,
nard and saffron,
calamus and cinnamon,
with every kind of incense tree,
with myrrh and aloes,
and all the finest spices.
During Roman times, flowers were sold for 100 denarii per pound, which was about the same as a month's wages for a farm laborer, or fifty haircuts from the local barber. Its late Latin name was lavandārius, from lavanda (things to be washed), from the verb lavāre (to wash).[47]
Taxonomic table[edit]
Different lavender cultivars grown at Snowshill, Cotswolds.
This is based on the classification of Upson and Andrews, 2004.
Lavender field in Carshalton, London Borough of Sutton.
Field in Hitchin, England, UK
I. Subgenus Lavendula Upson & S.Andrews subgen. nov.
II. Subgenus Fabricia (Adams.) Upson & S. Andrews, comb.nov.
III. Subgenus Sabaudia (Buscal. & Muschl.) Upson & S. Andrews, comb. et stat. nov.
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Gallery[edit]
Lavender flower
Flower of cultivated lavender; Lavandula stoechas
Lavender garden, India
A field of lavender in France
A field of lavender on the edge of the London Borough of Sutton, England
Lavender and honeybees outside Aix-en-Provence, France
lavandula
References[edit]
^ "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew". kew.org..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ "Outdoor flowering plants - mona lavender". www.hgtv.com. HGTV. Retrieved 19 October 2018.
^ "Plant finder - Plectranthus mona lavender". www.missouribotanicalgarden.org. Missouri botanical garden. Retrieved 19 October 2018.
^ abcde Upson T, Andrews S (2004). The Genus Lavandula. Royal Botanic Gardens, Kew 2004. ISBN 9780881926422. Retrieved 2012-03-30.
^ L. H. Bailey. Manual of Cultivated Plants. MacMillan Publishing Company.
^ ab Lis-Balchin M, ed. (2002). Lavender: The genus Lavandula. Taylor and Francis. ISBN 9780203216521.
^ Chaytor D A. A taxonomic study of the genus Lavandula. 1937
^ Concise Oxford Dictionary
^ The alternative derivation of the name lavender from Latin livere and medieval Latin lavindula is given in Upson and Andrews, where it is presented as a conjecture. The problems with the standard derivation are also described; such as that there is no knowledge of the common use of lavender for washing by Greeks and Romans.
^ Hillier
^ Carr, G.W, Yugovic, J.V and Robinson, K.E.. 'Environmental Weed Invasions in Victoria – conservation and management implications' 1992 Pub: Department of Conservation and Environment and Ecological Horticulture, Victoria, Australia
^ Csurches S., Edwards R.; National Weeds Program, Potential Environmental Weeds in Australia, Candidate Species for Preventative Control; Queensland Department of Natural Resources. January 1998
ISBN 0-642-21409-3 Also [1]
^ ab Grieve, Mrs. M. A Modern Herbal, Vol. II, New York: Dover Publications, Inc., 1971.
ISBN 0-486-22799-5)
^ Kathleen Norris Brenzel, editor, The Sunset Western Garden Book, 7th Edition
^ ab Ernst, Matt (2017). "Lavender" (PDF). University of Kentucky Center for Crop Diversification.
^ Moon, T; Wilkinson, JM; Cavanagh, HM (2006). "Antiparasitic activity of two Lavandula essential oils against Giardia duodenalis, Trichomonas vaginalis and Hexamita inflata". Parasitology research. 99 (6): 722–8. doi:10.1007/s00436-006-0234-8. PMID 16741725.
^ Inouye, S.; Takizawa, T.; Yamaguchi, H. (2001). "Antibacterial activity of essential oils and their major constituents against respiratory tract pathogens by gaseous contact". Journal of Antimicrobial Chemotherapy. 47 (5): 565–73. doi:10.1093/jac/47.5.565. PMID 11328766.
^ Hajhashemi, V; Ghannadi, A; Sharif, B (2003). "Anti-inflammatory and analgesic properties of the leaf extracts and essential oil of Lavandula angustifolia Mill". Journal of Ethnopharmacology. 89 (1): 67–71. doi:10.1016/S0378-8741(03)00234-4. PMID 14522434.
^ Natural Mosquito Repellents in the Wild
^ Mark Griffiths, Index of Garden Plants (Portland, Oregon: Timber Press, 1994.
ISBN 0-333-59149-6.)
^ National Non-Food Crops Centre. "Lavender". Retrieved on 2009-04-23.
^ abcde Lavender WhatsCookingAmerica.net
^ Pasta With Shredded Vegetables and Lavender Recipe, New York Times, 08.27.2008
^ M. G. Kains (1912). American Agriculturist, ed. Culinary Herbs: Their Cultivation Harvesting Curing and Uses (English). Orange Judd Company.
^ ab "Cooking with Lavender - Purple Haze Lavender (Sequim, WA)". Purple Haze Lavender.
^ "Cooking with Lavender?". Chowhound. June 24, 2009. Retrieved 16 February 2017.
^ "Cooking With Lavender", Bon Appetit, March 27, 2015
^ Stradley, Linda (22 April 2015). "Lavender Scones, Whats Cooking America". What's Cooking America. Retrieved 16 February 2017.
^ Maclain, Ben (2 May 2015). "Lavender Marshmallows - Havoc In The Kitchen". Havoc In The Kitchen. Retrieved 16 February 2017.
^ "Lavender: 12 Uses Beyond Potpourri". living on a green thumb. October 7, 2015. Retrieved 16 February 2017.
^ J.-B. Reboul; Cuisinière Provençale (1910)
^ Laget, F. (2005). "From its Birthplace in Egypt to Marseilles, an Ancient Trade: Drugs and Spices". Diogenes. 52 (3): 131–139. doi:10.1177/0392192105055941.
^ Umezu, Toyoshi; Nagano, Kimiyo; Ito, Hiroyasu; Kosakai, Kiyomi; Sakaniwa, Misao; Morita, Masatoshi (1 December 2006). "Anticonflict effects of lavender oil and identification of its active constituents". Pharmacology Biochemistry and Behavior. 85: 713–721. doi:10.1016/j.pbb.2006.10.026. Retrieved 20 February 2017.
^ Kasper, S; Gastpar, M; Müller, WE; Volz, HP; Möller, HJ; Dienel, A; Schläfke, S (2010). "Silexan, an orally administered Lavandula oil preparation, is effective in the treatment of 'subsyndromal' anxiety disorder: a randomized, double-blind, placebo controlled trial". International Clinical Psychopharmacology. 25 (5): 277–87. doi:10.1097/YIC.0b013e32833b3242. PMID 20512042.
^ Perry, R; Terry, R; Watson, L. K.; Ernst, E (2012). "Is lavender an anxiolytic drug? A systematic review of randomised clinical trials". Phytomedicine. 19 (8–9): 825–35. doi:10.1016/j.phymed.2012.02.013. PMID 22464012.
^ "Expanded Commission E monograph: Lavender flower". cms.herbalgram.org. Integrative Medicine Communications, Germany; from the American Botanical Council. 2000. Retrieved 18 October 2018.
^ "Oils 'make male breasts develop'". British Broadcasting Corporation. February 2007. Retrieved 2018-03-17.
^ "More evidence essential oils 'make male breasts develop'". British Broadcasting Corporation. March 2018. Retrieved 2018-03-17.
^ "Lavender: Science and Safety". National Center for Complementary and Integrative Health. March 2007. Retrieved 2013-11-05.
^ Cavanagh, Heather MA; Wilkinson, Jenny M (March 2005). "Lavender essential oil: a review" (PDF). Australian Infection Control. CSIRO Publishing. Retrieved 2013-11-06.
^ Henley DV, Lipson N, Korach KS, Bloch CA (2007). "Prepubertal gynecomastia linked to lavender and tea tree oils". N. Engl. J. Med. 356 (5): 479–485. doi:10.1056/NEJMoa064725. PMID 17267908.
^ Diaz A, Luque L, Badar Z, Kornic S, Danon M (2016). "Prepubertal gynecomastia and chronic lavender exposure: report of three cases". J. Pediatr. Endocrinol. Metab. 29 (1): 103–107. doi:10.1515/jpem-2015-0248. PMID 26353172.
^ Placzek, M; Frömel, W; Eberlein, B; Gilbertz, KP; Przybilla, B (2007). "Evaluation of phototoxic properties of fragrances". Acta dermato-venereologica. 87 (4): 312–6. doi:10.2340/00015555-0251. PMID 17598033.Also, oils of lemon, lavender, lime, sandalwood and cedar are known to elicit cutaneous phototoxic reactions, but lavender, sandalwood and cedar oil did not induce photohaemolysis in our assay...Lavender oil and sandalwood oil did not induce photohaemolysis in our test system. However, a few reports on photosensitivity reactions due to these substances have been published, e.g. one patient with persistent light reaction and a positive photo-patch test to sandalwood oil
^ "Lavender Tree". joys-of-lavender.com. Retrieved 16 February 2017.
^ The origin of most of these quotes comes from Dr. William Thomas Fernie, in his book "Herbal Simples" (Bristol Pub., 1895. ASIN: B0014W4WNE). A digital copy of the book can be read online via google books.
'By the Greeks the name Nardus is given to Lavender, from Naarda, a city of Syria near the Euphrates, and many persons call the plant "Nard." St. Mark mentions this as Spikenard, a thing of great value. In Pliny's time, blossoms of the Nardus sold for a hundred Roman denarii (or L.3 2s. 6d.) the pound. This Lavender or Nardus was called Asarum by the Romans, because it was not used in garlands or chaplets. It was formerly believed that the asp, a dangerous kind of viper, made Lavender its habitual place of abode, so that the plant had to be approached with great caution.'
^ "Song of Solomon". Bible Gateway.
^ Oxford English Dictionary (second ed.). 1989.Note however that Upson and Andrews refer to research on bathing in the Roman Empire, and state that there is no mention of the use of lavender in works on this subject.
Further reading[edit]
- Upson T, Andrews S. The Genus Lavandula. Royal Botanic Gardens, Kew 2004
- United States Department of Agriculture GRIN: Lavandula
External links[edit]
 | Wikimedia Commons has media related to Lavandula. |
Lavandula at Curlie
Authority control  |
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Categories:
- Lavandula
- Lamiaceae genera
- Herbs
- Medicinal plants
- Taxa named by Carl Linnaeus
- Melliferous flowers
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