WordNet sense 1 (white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum):

Chrysanthemum cinerariifolium, Dalmatian pyrethrum, Dalmatia pyrethrum, Tanacetum cinerariifolium

WordNet sense 2 (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):

painted daisy, Chrysanthemum coccineum, Tanacetum coccineum

WordNet sense 3 (used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum):

genus Pyrethrum