Artemisia vulgaris (mugwort or common wormwood)
We remove this plant because it has toxic substance in its roots, which results in a mono culture.
This plant has to be removed with as much of the roots as you can manage.
We have learned to "talk" to the roots by simply shaking the plant, giving it a little tug. When you come back a while later, the roots let go and you can easily pull out the plants with the roots.
Often we go back after some time to remove more of the rootsystem that remained in the ground.