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Common Tansy
Photo Credit: Nicole Kimmel, Alberta Agriculture & Forestry

Common Name: Common tansy

Scientific Name: Tanacetum vulgare

Habitat: disturbed areas, roadsides, grassland

Provincial Designation: Noxious

Noxious weeds are plant species that are designated as "noxious weeds" in the Alberta weed regulation. Noxious weeds must be controlled, meaning their growth or spread needs to be prevented.

Origin

In the 1600s, common tansy was introduced to North America from Europe. Traditionally, its foliage has been used medicinally as an insect repellent and for embalming.

Legislated Because

Common tansy invades disturbed areas, roadsides and grassland and can form dense stands in these habitats. It contains alkaloids that are toxic to both humans and livestock if consumed in large quantities. Grazing livestock avoids common tansy if they can. Therefore, livestock poisoning is rare.

Description

Common tansy has unique yellow, button-like flowers that are arranged in dense, flat-topped clusters at the end of the stems.

The leaves are deeply lobed or pinnate and alternately arrangement along the stem.

Stems are round, often purplish-red, and dotted with glands.

This plant can grow up to 5-150 cm high.

Learn more about this species:

SeeFact Sheets - Alberta Invasive Species Council

For More Information

Weed Management

Telephone

In Edmonton: 311

Outside Edmonton: 780-442-5311

Email invasiveweeds@edmonton.ca

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