Andy's Northern Ontario Wildflowers - Common Tansy (Tanacetum vulgare) is an alien plant that was introduced to North America from Europe in the 1600's (https://www.huffingtonpost.ca/the-nature-conservancy-of-canada/meet-the-invasive-plants-threatening ...
![Tanacetum vulgare (Bitter Buttons, Common Tansy, Cow Bitter, Garden Tansy, Golden Buttons, Tansy) | North Carolina Extension Gardener Plant Toolbox Tanacetum vulgare (Bitter Buttons, Common Tansy, Cow Bitter, Garden Tansy, Golden Buttons, Tansy) | North Carolina Extension Gardener Plant Toolbox](https://s3.amazonaws.com/eit-planttoolbox-prod/media/images/Tanacetum_vulgare_Ro_wIru4NDEkzB5.jpeg)
Tanacetum vulgare (Bitter Buttons, Common Tansy, Cow Bitter, Garden Tansy, Golden Buttons, Tansy) | North Carolina Extension Gardener Plant Toolbox
![Tanacetum vulgare (Bitter Buttons, Common Tansy, Cow Bitter, Garden Tansy, Golden Buttons, Tansy) | North Carolina Extension Gardener Plant Toolbox Tanacetum vulgare (Bitter Buttons, Common Tansy, Cow Bitter, Garden Tansy, Golden Buttons, Tansy) | North Carolina Extension Gardener Plant Toolbox](https://s3.amazonaws.com/eit-planttoolbox-prod/media/images/Tanacetum_vulgare_Ro_aX6UVN2IDKqD.jpeg)
Tanacetum vulgare (Bitter Buttons, Common Tansy, Cow Bitter, Garden Tansy, Golden Buttons, Tansy) | North Carolina Extension Gardener Plant Toolbox
![US Wildflower - Common Tansy, Golden Buttons, Bitter Buttons, Cow Bitter, Garden Tansy - Tanacetum vulgare US Wildflower - Common Tansy, Golden Buttons, Bitter Buttons, Cow Bitter, Garden Tansy - Tanacetum vulgare](http://bonap.net/MapGallery/State/Tanacetum%20vulgare.png)
US Wildflower - Common Tansy, Golden Buttons, Bitter Buttons, Cow Bitter, Garden Tansy - Tanacetum vulgare
![US Wildflower - Common Tansy, Golden Buttons, Bitter Buttons, Cow Bitter, Garden Tansy - Tanacetum vulgare US Wildflower - Common Tansy, Golden Buttons, Bitter Buttons, Cow Bitter, Garden Tansy - Tanacetum vulgare](http://uswildflowers.com/images/full/dsc_0262tanacetum.jpg)