The Common Tansy Tanacetum vulgare was one of the first medicinal herbs brought to North America. Some of the traditional uses for the plant in the past have been: to repel lice and fleas, kill intestinal worms and induce abortions (which would often prove to be fatal for both mother and child).
A single plant can produce over 50 000 seeds and, therefore, it is a troublesome weed throughout Canada.
The plant blooms from July to September in deep yellow clusters. The plant grows from 40 – 100 cm in height and has aromatic sharply toothed leaves.
from Alberta Wayside Wildflowers by Linda Kershaw
Devon, Alberta, Canada
Alberta Group – October 29, 2010
Wildflowers of North America – February 11, 2011
Wildflowers of North America – November 25, 2011