Tanacetum vulgare

Tanacetum vulgare_common tansy_JM DiTomaso
Photo courtesy Joseph DiTomaso

Common names: common tansy; golden buttons; garden tansy

Tanacetum vulgare (common tansy) is a perennial herb (family Asteraceae) found in the Coastal Ranges, Cascade Range and along the north coast of California. Common tansy inhabits riparian areas, forests, and disturbed places, including urban areas, fields, and roadsides. This European native is cultivated as a landscape ornamental and as a medicinal herb. Taken in great quantities, common tansy can be fatally toxic to humans and animals, and some individuals may experience an allergic reaction after handling the foliage. Common tansy reproduces by seed and vegetatively. It is known to produce dense colonies via its extensive creeping root system, especially in riparian areas.

Cal-IPC Rating: Moderate

Cal-IPC Assessment

Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.

Cal-IPC Symposium Presentations

  • None for this species.

Other Tanacetum vulgare Information

  • CalPhotos - Images of plants taken mostly in California.
  • CalFlora - Distribution information based on submitted observations and herbarium specimens.
  • CalWeedMapper - Distribution information with ability to determine regional priorities.
  • Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.