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Aconitum napellus

Aconitum napellus

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Ordo: Ranunculales

Familia: Ranunculaceae
Subfamilia: Ranunculoideae
Tribus: Delphinieae
Genus: Aconitum
Subgenus: A. subg. Aconitum
Sectio: A. sect. Aconitum
Series: A. ser. Aconitum
Species: Aconitum napellus
Subspecies: A. n. subsp. castellanum – A. n. subsp. corsicum – A. n. subsp. fissurae – A. n. subsp. lobelii – A. n. subsp. lusitanicum – A. n. subsp. napellus – A. n. subsp. superbum – A. n. subsp. vulgare

Forma: A. n. f. czarnohorense

Aconitum napellus L., Sp. Pl. 1: 532. 1753.

Aconitum Napellus Print by Walther Otto Mueller

Aconitum napellus, Walther Otto Mueller


Linnaeus, C. 1753. Species Plantarum. Tomus I: 532. Reference page.
Euro+Med 2006 onwards: Aconitum napellus in Euro+Med PlantBase – the information resource for Euro-Mediterranean plant diversity. Published online. Accessed: 2018 Apr 6.
USDA, ARS, Germplasm Resources Information Network. Aconitum napellus in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service.
Global Biodiversity Information Facility. 2019. GBIF Backbone Taxonomy. Checklist dataset. Taxon: Aconitum napellus.

Vernacular names
العربية: بيش , البيش
azərbaycanca: Turpabənzər kəpənəkçiçəyi
català: Tora blava, Acònit blau, Matallops blau
čeština: oměj šalamounek, oměj
Cymraeg: cwcwll y mynach
Deutsch: Blauer Eisenhut, Blauer Sturmhut, Sturmhut
English: Monk's-hood
español: acónito común, acónito, acónito-napelo, acónito vulgar, aconito-matalobos, anapelo, anapelo de flor azul, casco de Júpiter, hábito del diablo, hierba-matalobos, matalobos, matalobos de flor azul, nabieyo, nabillo del diablo, napelo, naviesu, tora, tora blava, vedegambre, vedegambre azul, yerba del lobado
euskara: Irabelar
suomi: Huppu-ukonhattu, aitoukonhattu
français: Aconit napel, Acinitum napellus
hornjoserbsce: Módre črijki, Swjateje marcyne stupnički, Swjateje marcyne kapički, Swjateje marcyne črijki, Módre hołbiki, Módre šišaki
magyar: Havasi sisakvirág, alpesi sisakvirág, kék sisakvirág, farkasfű, farkasgyökér, tetűfű, Katika-sisakvirág
italiano: Aconito napello, Strozzalupo, Napello, Aconito
lietuvių: Mėlynoji kurpelė
latviešu: Zilā kurpīte
മലയാളം: വത്സനാഭി
norsk bokmål: Storhjelm
Nederlands: Blauwe Monnikskap
polski: tojad mocny
پښتو: آکونیټوم ناپېللوس
português: acônito, acónito, aconítico
русский: Борец клобучковый
slovenčina: prilbica modrá
shqip: Spineri
српски / srpski: Једић / Jedić, Модри једић / Modri Jedić, Вучји чемер / Vučji čemer
Sunda: Wortel
svenska: Äkta stormhatt
中文(简体): 附子
中文(繁體): 附子
中文(臺灣): 附子
中文: 附子

Aconitum napellus, monk's-hood,[2] aconite or wolfsbane, is a species of highly toxic flowering plant in the genus Aconitum of the family Ranunculaceae, native and endemic to western and central Europe. It is an herbaceous perennial plant growing to 1 m (3 ft 3 in) tall, with hairless stems and leaves. The leaves are rounded, 5–10 cm (2.0–3.9 in) diameter, palmately divided into five to seven deeply lobed segments. The flowers are dark purple to bluish-purple, narrow oblong helmet-shaped, 1–2 cm (0.39–0.79 in) tall. Plants native to Asia and North America formerly listed as A. napellus are now regarded as separate species. The plant is extremely poisonous in both ingestion and body contact.


Aconitum napellus is grown in gardens in temperate zones for its spiky inflorescences that are showy in early-mid summer, and its attractive foliage. There are white and rose colored forms in cultivation too. The cultivar 'Spark's Variety' has gained the Royal Horticultural Society's Award of Garden Merit.[3][4]

Nine subspecies are accepted by the Flora Europaea:[5]

Aconitum napellus subsp. napellus, south-western Britain
Aconitum napellus subsp. corsicum (Gáyer) W.Seitz, Corsica
Aconitum napellus subsp. firmum (Rchb.) Gáyer, Central and eastern Europe
Aconitum napellus subsp. fissurae (Nyár.) W.Seitz, Balkans to south-western Russia
Aconitum napellus subsp. hians (Rchb.) Gáyer, Central Europe
Aconitum napellus subsp. lusitanicum Rouy, south-western Europe
Aconitum napellus subsp. superbum (Fritsch) W.Seitz, western Balkans
Aconitum napellus subsp. tauricum (Wulfen) Gáyer, Eastern Alps, southern Carpathians (declared as an own species Aconitum tauricum by other sources[6][7])
Aconitum napellus subsp. vulgare (DC.) Rouy & Foucaud, Alps, Pyrenees, northern Spain


Aconitum napellus is grown in gardens for its attractive spike-like inflorescences and showy blue flowers.[8] It is a cut flower crop used for fresh cutting material and sometimes used as dried material. The species has a low natural propagation rate under cultivation and is propagated by seed or by removing offsets that are generated each year from the rootstocks. The use of micropropagation protocols has been studied.[9] This species has been crossed with other Aconitums to produce attractive hybrids for garden use, including Aconitum × cammarum.[10]

Like other species in the genus, A. napellus contains several poisonous compounds, including enough cardiac poison that it was used on spears and arrows for hunting and battle in ancient times.[11] Persian physician Avicenna (980–1037) wrote that arrows dipped in the sap were used to kill, and Dr Antonio Guaineri, in one of the first medical dictionaries 'Practica', wrote that arrows that had the poison from roots of the plant were used to kill wild goats in Italy.[12] A. napellus has a long history of use as a poison, with cases going back thousands of years.[13] During the ancient Roman period of European history, the plant was often used to eliminate criminals and enemies, and by the end of the period it was banned and anyone growing A. napellus could have been legally sentenced to death.[14] Aconites have been used more recently in murder plots; they contain the chemical alkaloids aconitine, mesaconitine, hypaconitine and jesaconitine, which are highly toxic.[15] It was also used in a recent Sherlock Holmes book plot.[16]

Marked symptoms may appear almost immediately, usually not later than one hour, and "with large doses, death is almost instantaneous".[17] Death usually occurs within two to six hours in fatal poisoning (20 to 40 mL of tincture may prove fatal).[18] The initial signs are gastrointestinal including nausea, vomiting, and diarrhea. This is followed by a sensation of burning, tingling, and numbness in the mouth and face, and of burning in the abdomen.[19] In severe poisonings pronounced motor weakness occurs and cutaneous sensations of tingling and numbness spread to the limbs. Cardiovascular features include hypotension, sinus bradycardia, and ventricular arrhythmias. Other features may include sweating, dizziness, difficulty in breathing, headache, and confusion. The main causes of death are ventricular arrhythmias and asystole, paralysis of the heart or of the respiratory center.[18][20] The only post-mortem signs are those of asphyxia.[19]

Treatment of poisoning is mainly supportive. All patients require close monitoring of blood pressure and cardiac rhythm. Gastrointestinal decontamination with activated charcoal can be used if given within one hour of ingestion.[21] The major physiological antidote is atropine, which is used to treat bradycardia. Other drugs used for ventricular arrhythmia include lidocaine, amiodarone, bretylium, flecainide, procainamide, and mexiletine. Cardiopulmonary bypass is used if symptoms are refractory to treatment with these drugs.[20] Successful use of charcoal hemoperfusion has been claimed in patients with severe aconite poisoning.[22]

Poisoning may also occur following picking the leaves without wearing gloves; the aconitine toxin is absorbed easily through the skin. In this event, there will be no gastrointestinal effects. Tingling will start at the point of absorption and extend up the arm to the shoulder, after which the heart will start to be affected. The tingling will be followed by unpleasant numbness. Treatment is similar to poisoning caused by oral ingestion and even handling the plant without gloves has been reported to result in multi-organ failure and death.[23][24]

The plant's chief toxic component, aconitine, is a potent neurotoxin that opens tetrodotoxin sensitive sodium channels.[25] It increases the influx of sodium through these channels and delays repolarization, thus increasing excitability and promoting ventricular dysrhythmias.[25]

Chappuis, E. (2014). "Aconitum napellus". IUCN Red List of Threatened Species. 2014: e.T165155A57117867. doi:10.2305/IUCN.UK.2014-1.RLTS.T165155A57117867.en. Retrieved 19 November 2021.
BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
"RHS Plant Selector - Aconitum 'Spark's Variety'". Retrieved 17 July 2013.
Bourne, Val (31 July 2009). "How to grow: Aconitum 'Sparks Variety'". The Telegraph. Retrieved 7 June 2020.
Flora Europaea: Aconitum napellus
The Plant List (KEW): Aconitum tauricum (2018-05-03)
Jäger et al.: Rothmaler - Exkursionsflora von Deutschland, Bd. 2. Ed. 20, Spektrum akadem. Verlag.
Datta, Subhash Chandra. 1988 Systematic botany. New Delhi: Wiley Eastern Ltd.
A. A. Watad, M. Kochba, A. Nissim and V. Gaba, "Improvement of Aconitum napellus micropropagation by liquid culture on floating membrane rafts", Journal Plant Cell Reports, Publisher: Springer Berlin / Heidelberg, ISSN 0721-7714 (Print) ISSN 1432-203X (online), Volume 14, Number 6 / March 1995, DOI 10.1007/BF00238594, pages 345–348
Armitage, A. M. 2000. Armitage's garden perennials a color encyclopedia. Portland, Oregon: Timber Press. Pages 19–20.
J Ethnopharmacol. 1981 Nov;4(3):247-336. Arrow poisons in China. Part II. Aconitum--botany, chemistry, and pharmacology. Bisset NG.
Luke DeMaitre Medieval Medicine: The Art of Healing, from Head to Toe (2013), p. 67, at Google Books
"Toxicology in the Old Testament: Did the High Priest Alcimus Die of Acute Aconitine Poisoning?" Authors: Moog F.P.1; Karenberg A.1 Source: Adverse Drug Reactions & Toxicological Reviews (now known as Toxicological Reviews), Volume 21, Number 3, 2002 , pp. 151–156(6) Publisher: Adis International
Roberts, M. F., and Michael Wink. 1998. Alkaloids biochemistry, ecology, and medicinal applications. New York: Plenum Press. Page 18.
CSA Archived December 8, 2008, at the Wayback Machine
Gary Lovisi and Marvin Kaye The Great Detective: His Further Adventures: A Sherlock Holmes Anthology (2012), p. 55, at Google Books
R.D. Mann Modern Drug use: An Enquiry on Historical Principles (1984), p. 66, at Google Books
The Extra Pharmacopoeia Martindale. Vol. 1, 24th edition. London: The Pharmaceutical Press, 1958, page 38.
One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Aconite". Encyclopædia Britannica. Vol. 1 (11th ed.). Cambridge University Press. pp. 151–152.
Chan TY (April 2009). "Aconite poisoning". Clin Toxicol. 47 (4): 279–85. doi:10.1080/15563650902904407. PMID 19514874. S2CID 2697673.
Chyka PA, Seger D, Krenzelok EP, Vale JA (2005). "Position paper: Single-dose activated charcoal". Clin Toxicol. 43 (2): 61–87. doi:10.1081/CLT-51867. PMID 15822758.
Lin CC, Chan TY, Deng JF (May 2004). "Clinical features and management of herb-induced aconitine poisoning". Ann Emerg Med. 43 (5): 574–9. doi:10.1016/j.annemergmed.2003.10.046. PMID 15111916.
"Gardener Nathan Greenway 'died after handling deadly plant'". BBC News. BBC. 7 November 2014. Retrieved 7 November 2014.
"Gardener dies 'after brushing against deadly wolfsbane flower' on millionaire's estate". Independent. 11 November 2014. Archived from the original on 2014-11-07. Retrieved 2 February 2015.
Ohno Y, Chiba S, Uchigasaki S, Uchima E, Nagamori H, Mizugaki M, Ohyama Y, Kimura K, Suzuki Y (June 1992). "The influence of tetrodotoxin on the toxic effects of aconitine in vivo" (pdf). The Tohoku Journal of Experimental Medicine. 167 (2): 155–8. doi:10.1620/tjem.167.155. PMID 1475787.

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