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Alliaria petiolata

Alliaria petiolata (*)

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids II
Ordo: Brassicales

Familia: Brassicaceae
Tribus: Thlaspideae
Genus: Alliaria
Species: Alliaria petiolata
Name

Alliaria petiolata (M.Bieb.) Cavara & Grande, Bull. Orto Bot. Regia Univ. Napoli 3: 418. 1913.
Synonyms

Basionym
Arabis petiolata M.Bieb., Fl. Taur.-Caucas. 2: 126. 1808.
Replaced synonym
Erysimum alliaria L., Sp. Pl. 2: 660. 1753.
Homotypic
Alliaria alliaria (L.) Huth, Helios 11: 132 1893, nom. inval.
Arabis alliaria (L.) Bernh., Syst. Verz. Pfl. Erfurt, 195. 1800.
Crucifera alliaria (L.) E.H.L.Krause, Sturm's Fl. Deutschl., ed. 2, 6: 88. 1902.
Hesperis alliaria (L.) Lam., Fl. Fr., 2: 503. 1779.
Sisymbrium alliaria (L.) Scop., Fl. Carniol., ed. 2, 2: 26. 1771.
Heterotypic
Alliaria alboi Sennen, Pl. Espagne 1926 n.° 5683. 1927.
Alliaria alliacea (Crantz) Britten & Rendle, List Brit. Seed-Pl. Ferns 3. 1907.
Alliaria fuchsii Rupr., Fl. Caucasi 85. 1869.
Alliaria mathioli Rupr., Fl. Caucasi 85. 1869.
Alliaria officinalis Andrz. ex DC., Fl. Taur.-Caucas. 3: 445. 1820, nom. inval.
Clypeola alliacea Crantz, Cl. Crucif. Emend. 91. 1769, based on Sisymbrium alliaceum Salisb., nom. illeg.
Erysimum alliaceum Salisb., Prodr. Stirp. Chap. Allerton 270. 1796.
Erysimum cordifolium Pall., Tabl. Taur. 54. 1795.
Sisymbrium alliaceum Salisb., Prodr. 270. 1796, nom. illeg.
Sisymbrium truncatum Dulac, Fl. Hautes-Pyr., 197. 1867.

References
Primary references

Cavara, F. & Grande, L. 1913. Bulletino dell' Orto Botanico della Regia Universita de Napoli. Naples 3: 418.

Additional references

Castroviejo, S. et al. (eds.) 2014. Alliaria petiolata in Flora Ibérica. Plantas vasculares de la Península Ibérica, e Islas Baleares. Published online. Accessed: 2014 June 04. Reference page.

Links

Tela Botanica (ed.) 2000 onwards: Tela Botanica. Le réseau de la botanique francophone. eFlore. Alliaria petiolata. Association Tela Botanica, Montpellier, France. Accessed: 2014 June 04.
USDA, ARS, Germplasm Resources Information Network. Alliaria petiolata in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.
Koch, M.A. et al. 2018. Alliaria petiolata in BrassiBase Tools and biological resources to study characters and traits in the Brassicaceae. Published online. Accessed: 2018 Dec 14.

Vernacular names
العربية: ثومية معنقة
беларуская: Часночніца чаранковая
български: Лъжичина
català: Al·liària
čeština: Česnáček lékařský
Cymraeg: Garlleg y berth
dansk: Almindelig Løgkarse
Deutsch: Knoblauchsrauke
English: Garlic Mustard
Esperanto: Oficina aliario
español: Aliaria
فارسی: گندنایی
suomi: Litulaukka
français: Alliaire officinale
Gaeilge: Bóchoinneal
Gàidhlig: Gàirleach-callaid
hrvatski: Češnjevka
hornjoserbsce: Prawy česnak
magyar: Kányazsombor
italiano: Alliaria
Lëtzebuergesch: Bloderkraut
Limburgs: Look zónder look
lietuvių: Vaistinė česnakūnė
Nederlands: Look-zonder-look
norsk nynorsk: Laukurt
norsk: Løkurt
polski: Czosnaczek pospolity
português: Erva-alheira
русский: Чесночница черешчатая
slovenčina: Cesnačka lekárska
svenska: Löktrav
Türkçe: Sarmısak otu
українська: Кінський часник черешковий
walon: A des håyes
中文: 葱芥

Alliaria petiolata, or garlic mustard, is a biennial flowering plant in the mustard family (Brassicaceae). It is native to Europe, western and central Asia, north-western Africa, Morocco, Iberia and the British Isles, north to northern Scandinavia,[2] and east to northern Pakistan and Xinjiang in western China.[1]

In the first year of growth, plants form clumps of round, slightly wrinkled leaves, that when crushed smell like garlic. The plants flower in spring of the next year, producing cross shaped white flowers in dense clusters. As the flowering stems bloom they elongate into a spike-like shape. When flowering is complete, plants produce upright fruits that release seeds in mid-summer. Plants are often found growing along the margins of hedges, giving rise to the old British folk name of jack-by-the-hedge. Other common names include: garlic mustard,[3] garlic root, hedge garlic, sauce-alone, jack-in-the-bush, penny hedge and poor man's mustard. The genus name Alliaria, "resembling Allium", refers to the garlic-like odour of the crushed foliage.

All parts of the plant, including the roots, give off a strong odour like garlic.

Description

It is an herbaceous biennial plant growing from a deeply growing, thin, whitish taproot scented like horseradish. In their first years, plants are rosettes of green leaves close to the ground; these rosettes remain green through the winter and develop into mature flowering plants the following spring. Second-year plants often grow from 30–100 cm (12–39 in) tall, rarely to 130 cm (51 in) tall. The leaves are stalked, triangular through heart shaped, 10–15 cm (3.9–5.9 in) long (of which about half being the petiole) and 5–9 cm (2.0–3.5 in) broad, with coarsely toothed margins. The flowers are produced in spring and summer in small clusters. Each small flower has four white petals 4–8 mm (0.2–0.3 in) long and 2–3 mm (0.08–0.12 in) broad, arranged in a cross shape. The fruit is an erect, slender, four-sided capsule 4–5.5 cm (1.6–2.2 in) long,[4] called a silique, green maturing to pale grey brown, containing two rows of small shiny black seeds which are released when a silique splits open. A single plant can produce hundreds of seeds, which often scatter several meters from the parent plant.

Depending upon conditions, garlic mustard flowers either self-fertilize or are cross-pollinated by a variety of insects.
Close-up of garlic mustard flowers
garlic mustard seeds

Sixty-nine insect herbivores and seven fungi are associated with garlic mustard in Europe. The most important groups of natural enemies associated with garlic mustard were weevils (particularly the genus Ceutorhynchus), leaf beetles, butterflies, and moths, including the larvae of some moth species such as the garden carpet moth.[5] The small white flowers have a rather unpleasant aroma which attracts midges and hoverflies, although the flowers usually pollinate themselves. In June the pale green caterpillar of the orange tip butterfly (Anthocharis cardamines) can be found feeding on the long green seed-pods from which it can hardly be distinguished.[6]
Cultivation and uses

Garlic mustard is one of the oldest spices used in Europe. Phytoliths in pottery of the Ertebølle and Funnelneck-Beaker culture in north-eastern Germany and Denmark, dating to 4100–3750 BCE[7] prove its use.

In the 17th century Britain, it was recommended as a flavouring for salt fish. It can also be made into a sauce for eating with roast lamb or salad.[6] Early European settlers brought the herb to the New World to use as a garlic type flavouring. Its traditional medicinal purposes include use as a diuretic.[8] The herb was also planted as a form of erosion control.[9]

Today, the chopped leaves are used for flavouring in salads and sauces such as pesto, and sometimes the flowers and fruit are included as well. The leaves, best when young, taste of both garlic and mustard. The seeds are sometimes used in France to season food.[8] Garlic mustard was once used medicinally[10] as a disinfectant or diuretic, and was sometimes used to treat wounds.[8]
Toxicity

Young first-year garlic mustard plants contain up to 100ppm cyanide, a level which is toxic to many vertebrates.[dubious – discuss][11] Once the plant is chopped up the cyanide gas is eliminated.[12]
North America
Main article: Garlic mustard as an invasive species

Garlic mustard was introduced to North America by European settlers in the 1800s for culinary and medicinal purposes.[13] The species was recorded as being in Long Island in 1868.[14] It has since spread all over North America, apart from the far south of the US and some prairie states and Canadian provinces.[15] It is toxic or unpalatable to many native herbivores, as well as to some native Lepidoptera.[16][17][18][19]

The plant is classified as an invasive species in North America. Since being brought to the United States by settlers, it has naturalized and expanded its range to include most of the Northeast and Midwest, as well as south-eastern Canada.[20] It is one of the few invasive herbaceous species able to dominate the understory of North American forests and has thus reduced the biodiversity of many areas.[5]

Of the many natural enemies it has in its native range, several have been tested for use as biological control agents. Five weevil species from the genus Ceutorhynchus and one flea beetle were selected as candidates for preliminary testing in the 1990s. Since that time, those studying the candidates have narrowed the list to two or three weevils. Despite the demonstrated effectiveness of C. scrobicollis and C. constrictus in field testing, the importation and release of biological control agents such as those has been repeatedly blocked by the USDA's TAG (Technical Advisory Group). In particular, C. scrobicollis, which is monophagous and has been specifically studied since 2002, continues to be blocked, despite researchers' many petitions for approval.[21][22] It is currently estimated that adequate control of garlic mustard can be achieved by the introduction of just two weevils, with C. scrobicollis being the most important of the two.[23] None of the roughly 76 species that control this plant in its native range has been approved for introduction as of 2018 and federal agencies continue to use more traditional forms of control, such as chemical herbicides.[24]

In North America, the plant offers no known wildlife benefits and is toxic to larvae of certain rarer butterfly species (e.g. Pieris oleracea and Pieris virginiensis) that lay eggs on the plants, as it is related to native mustards but creates chemicals that they are not adapted to.[25][26] Native species, including two stem-mining weevils, a stem-mining fly, a leaf-mining fly, a scale insect, two fungi, and aphids (taxonomic identification for all species is pending) were found attacking garlic mustard in North America. However, their attacks were of little consequence to plant performance or reproduction of garlic mustard.[5]
References

"Alliaria petiolata (M.Bieb.) Cavara & Grande | Plants of the World Online | Kew Science". powo.science.kew.org. Retrieved 1 May 2022.
"Flora Europaea". Royal Botanic Garden Edinburgh.
BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 26 June 2015. Retrieved 17 October 2014.
"Invader of the Month – Garlic Mustard – Alliaria petiolata" (PDF). Archived from the original (PDF) on 9 June 2015. Retrieved 21 May 2009.
Blossey, Bernd; Nuzzo, Victoria A.; Hinz, Hariet L.; Gerber, Esther (August 2002). "Garlic Mustard". In Van Driesche, Roy; Blossey, Bernd; Hoddle, Mark; Lyon, Suzanne; Reardon, Richard (eds.). Biological Control of Invasive Plants in the Eastern United States (PDF). USDA Forest Service. pp. 365–372. CiteSeerX 10.1.1.96.3575.
Reader's Digest Nature Lover's Library, Field Guide to the Wildflowers of Britain, Editor Michael W. Davison, Art Editor Neal V. Martin, The Reader's Digest Association Limited, 11 Westferry Circus, Canary Wharf, London E144HE, Reprint 2001, ISBN 0 276 42506 5[page needed]
Saul, Hayley; Madella, Marco; Fischer, Anders; Glykou, Aikaterini; Hartz, Sönke; Craig, Oliver E. (21 August 2013). "Phytoliths in Pottery Reveal the Use of Spice in European Prehistoric Cuisine". PLOS ONE. 8 (8): e70583. Bibcode:2013PLoSO...870583S. doi:10.1371/journal.pone.0070583. PMC 3749173. PMID 23990910.
Gualtiero Simonetti (1990). Stanley Schuler (ed.). Simon & Schuster's Guide to Herbs and Spices. Simon & Schuster, Inc. ISBN 0-671-73489-X.
Kleinstein, Debby. "Introduced Species Summary Project Garlic Mustard (Alliaria petiolata)". Retrieved 19 May 2015.
"Plants for a Future: Database Search Results". Retrieved 16 May 2009.
Cipollini, Don; Gruner, Bill (19 December 2006). "Cyanide in the Chemical Arsenal of Garlic Mustard, Alliaria petiolata". Journal of Chemical Ecology. 33 (1): 85–94. doi:10.1007/s10886-006-9205-x. PMID 17146719. S2CID 34736542.
Main, Douglas (26 April 2021). "Invasive garlic mustard hurts native species—but its harmful powers wane over time". National Geographic. Retrieved 2 May 2022. "...the cyanide is easily sidestepped by chopping up the plant, which releases most of the gas in a few minutes."
"Garlic Mustard Monitoring Along the Bruce Trail in the Nottawasaga Valley Watershed" (PDF). Nottawasaga Valley Conservation Authority. Retrieved 3 May 2018.
Lyle, Katie Letcher (2010). Complete guide to edible wild plants, mushrooms, fruits, and nuts: how to find, identify, and cook them. FalconGuides. p. 17. ISBN 978-1-59921-887-8. OCLC 560560606.
"Alliaria petiolata". Ontario Wildflowers. Retrieved 3 May 2018.
Haribal, Meena; Renwick, J.Alan A. (April 1998). "Isovitexin 6"-O-β-d-glucopyranoside: A feeding deterrent to Pieris napi oleracea from Alliaria petiolata". Phytochemistry. 47 (7): 1237–1240. doi:10.1016/S0031-9422(97)00740-1.
Daxenbichler, Melvin E.; Spencer, Gayland F.; Carlson, Diana G.; Rose, Gertrude B.; Brinker, Anita M.; Powell, Richard G. (January 1991). "Glucosinolate composition of seeds from 297 species of wild plants". Phytochemistry. 30 (8): 2623–2638. doi:10.1016/0031-9422(91)85112-d.
Cipollini, D. (1 September 2002). "Variation in the expression of chemical defenses in Alliaria petiolata (Brassicaceae) in the field and common garden". American Journal of Botany. 89 (9): 1422–1430. doi:10.3732/ajb.89.9.1422. PMID 21665743.
Rodgers, Vikki L.; Wolfe, Benjamin E.; Werden, Leland K.; Finzi, Adrien C. (September 2008). "The invasive species Alliaria petiolata (garlic mustard) increases soil nutrient availability in northern hardwood-conifer forests". Oecologia. 157 (3): 459–471. Bibcode:2008Oecol.157..459R. doi:10.1007/s00442-008-1089-8. PMID 18612654. S2CID 13475605.
USDA NRCS National Plant Data Team. "Alliaria petiolata (M. Bieb.) Cavara & Grande". USDA Plants Database. United States Department of Agriculture. Retrieved 13 May 2022.
Landis, Doug. "Management Options". Integrated Pest Management. Michigan State University. Retrieved 10 September 2017.
Reardon, Richard. "FHTET Biological Control Program – Sponsored Projects" (PDF). FHTET Biological Control Program. USDA Forest Service. Retrieved 10 September 2017.
Becker, R., 2017. Implementing Biological Control of Garlic Mustard – Environment and Natural Resources Trust Fund 2017 RFP. http://www.lccmr.leg.mn/proposals/2017/original/107-d.pdf
Thiele, Rebecca (5 January 2018). "Invasive Garlic Mustard: Love It Or Leave It?". WOSU News.
"Pest Management Invasive Plant Control – Garlic Mustard (Alliara petiolata) USDA NRCS Conservation Practice Job Sheet MN-797" (PDF). Archived from the original (PDF) on 11 February 2017. Retrieved 27 May 2014.
Davis, Samantha (1 January 2015). Evaluating Threats to the Rare Butterfly, Pieris Virginiensis (Thesis).

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