Arnica

Yellow-flowered plant of the Compos itæ, Arnica montana, native of Europe and Asia. The officinal tincture is obtained from the flowers, and is used externally for wounds. Arnica montana. The various preparations of the root and flowers of this plant are largely used in domestic medicine, but are of little value. and must not be used indiscriminately, as severe headache, disturbed action of the heart, and other nervous phenomena have resulted from overdoses.