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Aloysia citriodora is a species of flowering plant in the verbena family Verbenaceae, native to western South America. Common names include lemon verbena and lemon beebrush. It was brought to Europe by the Spanish and the Portuguese in the 17th century and cultivated for its oil.
Lemon verbena is a perennial shrub or subshrub growing to 2–3 m high. The 8 cm long glossy, pointed leaves are slightly rough to the touch and emit a powerful scent reminiscent of lemon when bruised (hence the Latin specific epithet citriodora—lemon-scented).
Sprays of tiny purple or white flowers appear in late Spring or early Summer. It is sensitive to cold, losing leaves at temperatures below 0 °C (32 °F) although the wood is hardy to −10 °C (14 °F). Due to its many culinary uses, it is widely listed and marketed as a plant for the herb garden.
Lemon verbena leaves are used to add a lemon flavor to fish and poultry dishes, vegetable marinades, salad dressings, jams, puddings, Greek yogurt and beverages. It also is used to make herbal teas, or added to standard tea in place of actual lemon (as is common with Moroccan tea). It can also be used to make a sorbet. In addition, it has anti-Candida albicans activity. In the European Union, Verbena essential oils (Lippia citriodora Kunth.) and derivatives other than absolute are prohibited when used as a fragrance ingredient (Commission Directive 2009/164/EU of 22 December 2009).
Moderate antioxidant supplementation with lemon verbena extract protects neutrophils against oxidative damage, decreasing the signs of muscular damage in chronic running exercise without blocking the cellular adaptation to exercise.
Lippia citriodora extract shows antioxidant properties that could play an important role in modulating GSH-reductase activity in lymphocytes and erythrocytes and protecting plasma from exercise oxidative damage.
Lemon verbena extract containing 25% verbascoside showed strong antioxidant capacity, especially in a lipophilic environment, which was higher than expected as concluded from the antioxidant capacity of pure verbascoside, probably due to synergistic effects. The capacity of verbascoside to act as an effective radical scavenger in lipophilic environments was also shown. Verbascoside-enriched extracts might have interesting applications in cosmetic, nutraceuticals or functional food. Although some "in vitro" genotoxicity of verbascoside has been reported on human lymphocytes with an involvement of PARP-1 and p53 proteins, subsequent "in vivo" tests reported no genotoxicity for high dosage oral administration.
The first European botanist who publicly noticed this plant was the French Philibert Commerson, who collected in Buenos Aires on his botanical circumnavigation with Bougainville, about 1767. The plant had already been quietly imported directly into the Real Jardín Botánico de Madrid, where in 1797 professors Casimiro Gómez Ortega and Antonio Palau y Verdera named it, though they did not yet effectively publish it, Aloysia citriodora in Latin and "Hierba de la Princesa" in Spanish, to compliment Maria Louisa of Parma, Princess of Asturias the wife of the Garden's patron Infante Carlos de Borbon, Prince of Asturias and son of king Carlos III. The name was later effectively published in the first volume of Palau's Parte Práctica de Botánica in 1784.
Unofficial importations from Spanish America seldom fared well: when another French botanist Joseph Dombey landed his collections at Cadiz in 1785 they were impounded and left to rot in warehouses, while he was refused permission even to have seeds planted. Among the bare handful of plants Dombey had assembled during eight years at Lima, lemon verbena survived.
Meanwhile Gómez Ortega sent seeds and specimens of the plant to Charles Louis L'Héritier de Brutelle in Paris; L'Héritier published it as Verbena triphylla in the second fascicle his Stirpes Novae. published in December 1785 or January 1786. From Paris John Sibthorpe, professor of Botany at Oxford, obtained the specimen that he introduced to British horticulture: by 1797 lemon verbena was common in greenhouses around London, and its popularity as essential in a fragrant bouquet increased through the following century.
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- Aloysia citriodora Palau, Germplasm Resources Information Network (United States Department of Agriculture), 2010-02-04, retrieved 2010-04-12
- Armada, J. & A. Barra (1992). "On Aloysia Palau (Verbenaceae)". Taxon 41 (1): 88–90. JSTOR 1222497.
- Margaret Joan Roberts (2000). Margaret Roberts' A–Z Herbs: Identifying Herbs, How to Grow Herbs, the Uses of Herbs. Struik. p. 51. ISBN 978-1-86872-499-4.
- Harrison, Lorraine (2012). RHS Latin for gardeners. United Kingdom: Mitchell Beazley. p. 224. ISBN 9781845337315.
- http://www.hanasgarden.com/2011/05/lemon-verbena-aloysia-citriodora[dead link]
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- Teixeira D., Marta C., et al. (2005). "Anti-Candida activity of Brazilian medicinal plants". Journal of Ethnopharmacology 97 (2): 305–11. doi:10.1016/j.jep.2004.11.016.
- Funes, L; Carrera-Quintanar L; Cerdán-Calero M; Ferrer MD; Drobnic F; Pons A; Roche E; Micol V (Apr 2011). "Effect of lemon verbena supplementation on muscular damage markers, proinflammatory cytokines release and neutrophils' oxidative stress in chronic exercise". Eur J Appl Physiol. 111 (4): 695–705. doi:10.1007/s00421-010-1684-3. PMID 20967458.
- Carrera-Quintanar, L.; Funes L; Viudes E; Tur J; Micol V; Roche E; Pons A. (18 Nov 2010). "Antioxidant effect of lemon verbena extracts in lymphocytes of university students performing aerobic training program". Scand J Med Sci Sports. doi:10.1111/j.1600-0838.2010.01244.x.
- Funes L; S. Fernández-Arroyo; O. Laporta; A. Pons; E. Roche; A. Segura-Carretero (2009). "Correlation between plasma antioxidant capacity and verbascoside levels". Food Chemistry 117: 589–598. doi:10.1016/j.foodchem.2009.04.059.
- Antonietta Santoro, et al. (2008-05-05). "Verminoside- and verbascoside-induced genotoxicity on human lymphocytes: Involvement of PARP-1 and p53 proteins". Toxicology Letters 178 (2): 71–76. doi:10.1016/j.toxlet.2008.02.006. PMID 18395372.
- Santos-Cruz, L. F. et al. (Mar 2012). "Verbascoside is not genotoxic in the ST and HB crosses of the Drosophila wing spot test, and its constituent, caffeic acid, decreases the spontaneous mutation rate in the ST cross". Food Chem Toxicol. 50 (3–4): 1082–90. doi:10.1016/j.fct.2011.12.006. PMID 22197714.
- Lawless, J., The Illustrated Encyclopedia of Essential Oils, ISBN 1-85230-661-0
- Correlation between plasma antioxidant capacity and verbascoside levels in rats after oral administration of lemon verbena extract. Funes L, Fernández-Arroyo S, Laporta O, Pons A, Roche E, Segura-Carretero A, Fernández-Gutiérrez A and Micol V, Food Chemistry, 2009, Volume 117, No. 4, pages. 589-598, doi:10.1016/j.foodchem.2009.04.059
- Juan Armada and Alfredo Barra, "On Aloysia Palau (Verbenaceae)", Taxon 41 (1992:88f), note a recently discovered anonymous six-page printed booklet, dated Madrid 1779, reporting the new species, which they assert is correctly Aloysia citriodora (Palau).
- "un nuevo génera de planta consagrado a la Princesa de Asturias nuestra señora" in the title of the anonymous booklet.
- Sir James Edward Smith's furious account of the affair in Rees' Cyclopedia, is noted by Coats (1964) 1992.
- "RHS Plant Selector - Aloysia citriodora". Royal Horticultural Society. Retrieved 20 May 2013.