4 species
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Tanacetum balsamitacostmary
Distribution: Introduced and escaped over much of the United States; not common in the Pacific Northwest.
Habitat: Roadsides and other waste places.
Origin: Introduced
Flowers: August - September
Tanacetum bipinnatumcamphor tansy, dune tansy
Distribution: British Columbia to northern California.
Habitat: Sand dunes along the coast.
Origin: Native
Flowers: June - September
Tanacetum partheniumfeatherfew, feverfew
Distribution: Scattered locations throughout Washington; introduced in most of the western and eastern United States; escaped from gardens.
Habitat: Waste places.
Origin: Introduced from Europe
Flowers: June-September
Tanacetum vulgarecommon tansy
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Roadsides and waste ground, often cultivated and escaped
Origin: Introduced from Europe
Flowers: July-October