(n) a large genus of plants resembling chrysanthemums; comprises some plants often included in other genera especially genus Chrysanthemum, Syn. genus Tanacetum
(n) bushy aromatic European perennial herb having clusters of buttonlike white-rayed flower heads; valued traditionally for medicinal uses; sometimes placed in genus Chrysanthemum, Syn. Tanacetum parthenium, Chrysanthemum parthenium
(n) lightly hairy rhizomatous perennial having aromatic feathery leaves and stems bearing open clusters of small buttonlike yellow flowers; sand dunes of Pacific coast of North America, Syn. Tanacetum douglasii
(n) spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum, Syn. Chrysanthemum coccineum, Tanacetum coccineum, pyrethrum
(n) common perennial aromatic herb native to Eurasia having buttonlike yellow flower heads and bitter-tasting pinnate leaves sometimes used medicinally, Syn. Tanacetum vulgare, scented fern, golden buttons