Pyrethrum parthenium (L.) Sm., Fl. Brit. 2: 900. 1800 Pyrethrum parthenium (L.) Sm., Fl. Brit. 2: 900. 1800is new combination for Matricaria parthenium L., Sp. Pl.: 890. 1753Taxon for this namePyrethrum parthenium (L.) Sm.