Arnica /ˈɑːrnɪkə/ is a genus of perennial, herbaceous plants in the sunflower family (Asteraceae). The genus name
Arnica may be derived from the Greek
arni, "lamb", in reference to the plants' soft, hairy leaves.
Arnica is also known by the names
Mountain Tobacco and, confusingly,
Leopard's bane and
Wolfsbane—two names that it shares with the entirely unrelated genus
Aconitum.
(Wikipedia)