IUCN threat status:

Least Concern (LC)


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Arnica montana

Arnica montana, sometimes mistakenly referred to as leopard's bane,has also been called wolf's bane, mountain tobacco and mountain arnica,[1] is a European flowering plant with large yellow capitula. It also grows at about 4000 feet in the mountains of British Columbia.[citation needed]

Arnica has been used in herbal medicine.[2] for many years. It has been used by first nations healers in British Columbia, for centuries.[citation needed]

Distribution and habitat[edit]

Arnica montana

Arnica montana is endemic to Europe, from southern Iberia to southern Scandinavia and the Carpathians. It is absent from the British Isles and the Italian and Balkan Peninsulas. A. montana grows in nutrient-poor siliceous meadows up to nearly 3,000 metres (9,800 ft). It is rare overall, but may be locally abundant. It is becoming rarer, particularly in the north of its distribution, largely due to increasingly intensive agriculture. In more upland regions, it may also be found on nutrient-poor moors and heaths.


A. montana has tall stems, 20–60 centimetres (7.9–23.6 in) high, supporting usually a single flower head. Most of the leaves are in a basal rosette, but one or two pairs may be found on the stem and are, unusually for composites, opposite. The flower heads are yellow, approximately 5 cm in diameter, and appear from May to August.

Uses and toxicity[edit]

Arnica montana is sometimes grown in herb gardens and historically has been used as medicine.[3][4] It contains the toxin helenalin, which can be poisonous if large amounts of the plant are eaten. It produces severe gastroenteritis and internal bleeding of the digestive tract if enough material is ingested.[5][medical citation needed] Contact with the plant can also cause skin irritation.[6][7] The roots contain derivatives of thymol,[8] which are used as fungicides and preservatives and may have some anti-inflammatory effect.[9]

A scientific study by FDA funded dermatologists found that the application of topical arnica had no better effect than a placebo in the treatment of laser-induced bruising.[10][non-primary source needed]

Arnica montana fruits and seeds


  1. ^ a b Judith Ladner. "Arnica montana". Food and Agriculture Organization. Archived from the original on February 13, 2010. Retrieved March 16, 2010. 
  2. ^ Knuesel, O.; Weber, M.; Suter, A. (2002). "Arnica montana gel in osteoarthritis of the knee: An open, multicenter clinical trial". Advances in Therapy 19 (5): 209–218. doi:10.1007/BF02850361. PMID 12539881.  edit
  3. ^ "Arnica". Flora of North America. efloras.org. Archived from the original on April 4, 2010. Retrieved March 16, 2010. 
  4. ^ A. L. Butiuc-Keul & C. Deliu (2001). "Clonal propagation of Arnica montana L., a medicinal plant". In Vitro Cellular and Development Biology – Plant 37 (5): 581–585. doi:10.1007/s11627-001-0102-2. JSTOR 4293517. 
  5. ^ Gregory L. Tilford (1997). Edible and Medicinal Plants of the West. Mountain Press. ISBN 0-87842-359-1. 
  6. ^ "Poisonous Plants: Arnica montana". North Carolina State University. 
  7. ^ Rudzki E, Grzywa Z (October 1977). "Dermatitis from Arnica montana". Contact Dermatitis 3 (5): 281–2. doi:10.1111/j.1600-0536.1977.tb03682.x. PMID 145351. 
  8. ^ I. Weremczuk-Jezyna, W. Kisiel & H. Wysokińska (2006). "Thymol derivatives from hairy roots of Arnica montana". Plant Cell Reports 25 (9): 993–6. doi:10.1007/s00299-006-0157-y. PMID 16586074. 
  9. ^ P. C. Braga, M. Dal Sasso, M. Culici, T. Bianchi, L. Bordoni & L. Marabini (2006). "Anti-inflammatory activity of thymol: inhibitory effect on the release of human neutrophil elastase". Pharmacology 77 (3): 130–6. doi:10.1159/000093790. PMID 16763380. Retrieved January 27, 2008. 
  10. ^ Delilah Alonso, Melissa C. Lazarus & Leslie Baumann (2002). "Effects of topical arnica gel on post-laser treatment bruises". Dermatologic Surgery 28 (8): 686–8. doi:10.1046/j.1524-4725.2002.02011.x. PMID 12174058. Retrieved January 27, 2008. 


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