 Next week, collections will be held in Marshall County and in Kitson County. University of Minnesota has seen tansy. That's a common yet invasive plant spreading rapidly now in the northeastern part of the state. Researcher Ryan Briscoe-Runquist says the weed can easily take over large pastures, establishing dense monocultures. It out-competes kind of native forages or more nutritious forages, and it kind of impedes further reforestation and restoration efforts.