The leafy one looks like a Senecio. If it has a yello daisy like flower, it is. The spikes one is a Deuterochonia, previously called Abrometiella. Mir is Avery spikey bromeliad, and grows like a succulent rather than like the soft leaved bromeliads.

At that size it could be a number of things. Probably need to wait while it grows out some more.

The first one might be a Solomon's Seal plant unfolding it's leaves Polygonatum species. Looks like maybe something nipped off the original plant and it's growing a new shoot. The second one might be White Wood Aster, Eurybia divaricata; or maybe some other wild aster. Third one maybe a Black Cherry? Fourth one might be Tilia americana, as Floral_UK suggested. Makes me think a little bit of Hazelnut, too. I think the last one is probably an unfolding beech leaf. That's a lot of 'maybes' and 'I thinks' but it's a place to start.

Thanks for the feedback. After checking other photos and details for the plant I am sure you nailed it. In Michigan it is actually considered a Noxious weed and quite toxic to livestock, especially horses; in Europe it is considered an ornamental plant good for landscaping purposes so I guess I will still include it in my collection of wildflowers even though most people in Mich. might disagree.