Tanacetum parthenium, known as feverfew, is a flowering plant in the daisy family, Asteraceae. It may be grown as an ornament, and may be identified by its synonyms, Chrysanthemum parthenium and Pyrethrum parthenium. It is also used as a herbal medicine in the traditional sense and a dietary supplement to treat headache and other ailments, as well more recently in topical skin care as an antioxidant.