Good Morning Patricia, 

Thank you for contacting the U of M Extension Service. 

The plants are fairly small, but I used my plant identification app on your photos. The photo on the left appears to be: https://www.minnesotawildflowers.info/flower/jerusalem-artichoke

This is a native type of sunflower. 

The photo on the right might be Canada goldenrod: https://www.minnesotawildflowers.info/flower/canada-goldenrod

Here is a link from the U of M Extension Yard and Garden website: https://extension.umn.edu/find-plants/native-plants

Good Luck!

Patricia, 

You might wait until the plant is a little bigger and use a plant identification app on it again. 

Good Luck!

Good Morning Patricia, 

It is your choice how large or small a space you want this plant to occupy.  You can either dig them up, cut them off or put up a barrier (plastic edging?) around them to keep them from taking over. 

If you have other native plants in the same area, they should come up and compete. You can always just cut them off, allowing the other plants to take over. 

Here is a link from the U of M Extension Yard and Garden website: https://extension.umn.edu/find-plants/native-plants  If you scroll down, there are many resources on native plants. 

Good Luck!