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arnica(är`nəkə), any plant of the genus Arnica, yellow-flowered perennials of the family Asteraceae (asteraster
[Gr.,=star], common name for the Asteraceae (Compositae), the aster family, in North America, name for plants of the genus Aster, sometimes called wild asters, and for a related plant more correctly called China aster (Callistephus chinensis
..... Click the link for more information. family), native to north temperate and arctic regions. In North America, arnicas grow in woody areas of the plains region and the Pacific coast, northward to arctic Alaska. Medicinal preparations for the treatment of wounds and bruises are sometimes made from arnica plants, chiefly A. montana of the European Alps. Arnica is classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
..... Click the link for more information. , class Magnoliopsida, order Asterales, family Asteraceae.
a genus of perennial herbs of the family Compositae.
There are more than 30 species of Arnica, most of which are found in North America. Some are found in Europe and Asia. In the USSR there are eight species. The best known is mountain tobacco (A. montana). It has a short, thick rhizome, is up to 60 cm high, and has a single involucrate head of yellow orange flowers. Mountain tobacco is found in Byelorussia, Lithuania, and the western Ukraine in forests and mountain meadows. As a rule, it grows in moist soils. In medicine an alcohol infusion made from the dried flower heads is used as a cholagogue and an antihemorrhagic (in uterine hemorrhaging). Mountain tobacco, A. foliosa, and A. chamissonis are cultivated as medicinal plants.