Invasive Species Council of Manitoba

Common TansyTanacetum vulgare

Common Tansy can grow to be 1.5 - 2m tall and spreads mainly through seeds, which are able to germinate for up to 25 years!

Origin

Common Tansy is native to Europe. It is an aromatic perennial, introduced to North America in the early 1600's for medicinal and horticultural purposes.

Status

Common Tansy is classified as a noxious weed in Manitoba.

Impacts

Common Tansy can reduce productivityof pastures for livestock and threatens the ecological health of areas. It contains several toxic compounds which pose a health risk for animals and humans if eaten or absorbed through the skin.

Where to Look

Currently it is widespread across western Canada in pastures, roadsides, river banks, abandoned fields and natural areas.

Identification

Leaves: Deeply divided and fern-like leaves. Strongly aromatic when crushed.

Flowers: Produces numerous button-shaped bright yellow flowers in dense clusters at the top of the plant.

Common Tansy

Roots: This plant can spread through its extensive root system.

 

Photo Credits: Steve Dewey, Utah State University,  www.forestryimages.org (from www.invasive.org).

Prevention

Small infestations can be dug up, for larger infestations it all depends on the land use. Make sure to follow up on treated area and watch for re-growth!

Resources

Common Tansy ISCM Fact Sheet

2011 Rural Municipality Distribution Map

2010 Rural Municipality Distribution Map

Common Tansy MWSA 2009 Survey Map

Best Management Practices 2010

Alberta Invasive Plant Council Fact Sheet

 

Back to Terrestrial Invasive Species List

 





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