Department Header For Noxious Weed Division
Yellowstone County, Montana
Noxious Weed
Weed Information Contact Department


Common Tansy
(Tanacetum vulgare L.)


Common Tansy
Photo from Weeds of the West, revised edition

Common Tansy Toxic

Common Tansy Rosetta

Common Tansy Stem

Common Tansy Leaf

Common Tansy Bloom

Common Tansy Dormant

Toxicity: Can cause abortions in humans if ingested; will cause liver damage in some livestock, but it is largely palatable.

Growth Habit: Perennial, erect, bushy, to 6 feet tall.

Leaves: Dark green, alternate, deeply divided into numerous narrow, toothed leaflets (fern like).

Stem: Purplish red in color

Flower: Yellow, button - like, without petals, 1/2 inch across in flat topped dense clusters.

Roots: Reproduces from roots.

Seeds: Yellowish brown with short 5 toothed crown.

Reproduction: Reproduces by roots and seeds.

Habitat: It is generally found along roadsides, waste areas, streambanks, and in pastures throughout most of the U.S. and Canada.

Biological Controls:

Herbicides: Tordon + 2,4-D, Escort

Video Supplied By Montana Weed Control Association