Tanacetum (Tansy) is a genus of herb in the family Asteraceae. They are native to Canada, The Contiguous United States, and Alaska. They have achene. Flowers are visited by Siphona and Epicauta ferruginea.
Definition: The institution that holds a type specimen for a given species. The recommended best practice is to use the identifier in a collections registry such as the Biodiversity Collections Index (http://www.biodiversitycollectionsindex.org/).