Arnica

Botanical Name: Arnica montana (LINN.)
Family: N.O. Compositae

Synonyms: Mountain Tobacco. Leopard’s Bane.
Parts Used: Root, flowers.
Habitat: Arnica montana or Leopard’s Bane is a perennial herb, indigenous to Central Europe, in woods and mountain pastures. It has been found in England and Southern Scotland. but is probably an escape.The climate of meadows and mountainous regions of Europe and western North America is appropriate for the growth of this herb.

Description:

Arnica usually refers to Arnica montana, a mountain plant used for relief of bruises, stiffness, and muscle soreness in herbal medicine. Arnica is widely used as a salve for bruises and sprains , and sometimes as a tincture , for the same anti-inflammatory, pain-relieving purposes. In homeopathy it has a wider use. It is available in natural/health food stores, most commonly in gel form, to be applied to the affected area approximately three times daily.

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Botanical Description
Arnica is a genus with about 30 perennial, herbaceous species, belonging to the sunflower family (Asteraceae). The genus name Arnica may be derived from the Latin arna, “lamb”, in reference to the soft, hairy leaves.

This circumboreal and montane genus occurs mostly in the temperate regions of western North America, while two are native to Eurasia (A. angustifolia and A. montana).

Arnica used to be included in the tribe Senecioneae, because it has a pappus of fine bristles. This was soon questioned and Nordenstam (1977) placed it tentatively in tribe Heliantheae s.l. This arrangement also became uncertain because of the sesquiterpene lactone chemistry in certain species. Lately Arnica was placed in an unresolved clade together with Madiinae, Eupatorieae, Heliantheae s.s. and Pectidinae.

Several species, such as Arnica montana and Arnica chamissonis contain helenalin, a sesquiterpene lactone that is a major ingredient in anti-inflammatory preparations (mostly against bruises).

Arnica species are used as food plants by the larvae of some Lepidoptera species including Bucculatrix arnicella.
Cultivation: Arnica thrives in a mixture of loam, peat, and sand. It may be propagated by root division or from seed. Divide in spring. Sow in early spring in a cold frame, and plant out in May.

The flowers are collected entire and dried, but the receptacles are sometimes removed as they are liable to be attacked by insects.

The root is collected in autumn after the leaves have died down.

Constituents: A bitter yellow crystalline principle, Arnicin, and a volatile oil. Tannin and phulin are also present. The flowers are said to contain more Arnicin than the rhizome, but no tannin.

Medicinal Action and Uses:
Used externally this herb reduces inflammation and pain of bruises, aches, and sprains. While usage it must be kept in mind that internal application of this herb has a toxic effect on the heart and causes very high blood pressure.

In countries where Arnica is indigenous, it has long been a popular remedy. In the North American colonies the flowers are used in preference to the rhizome. They have a discutient property. The tincture is used for external application to sprains, bruises, and wounds, and as a paint for chilblains when the skin is unbroken. Repeated applications may produce severe inflammation. It is seldom used internally, because of its irritant effect on the stomach. Its action is stimulant and diuretic, and it is chiefly used in low fevers and paralytie affections.

Arnica flowers are sometimes adulterated with other composite flowers, especially Calendula officinalis, Inula brittanica, Kragapogon pratensis, and Scorzonera humilis.

A homoeopathic tincture, X6, has been used successfully in the treatment of epilepsy; also for seasickness, 3 X before sailing, and every hour on board till comfortable.

In homeopathic arnica in form of tincture or globules is very commonly used to releave the pain of any kind of wound.

For tender feet a foot-bath of hot water containing 1/2 oz. of the tineture has brought great relief. Applied to the scalp it will make the hair grow.

Great care must be exercised though, as some people are particularly sensitive to the plant and many severe cases of poisoning have resulted from its use, especially if taken internally.

Resources:

http://www.ayurveda-herbal-remedy.com/herbal-encyclopedia/index.html

en.wikipedia.org and botanical.com