Opposite leaves, very rough hairs
Pole cat rd
Starry rosinweed? This one had leaves in whorls of four instead of three. It probably was introduced in this location by planting/sowing though I'm not sure how long ago and if this plant came up on its own. Not sure if this was still budding or already fruiting.
Mequon Nature Preserve
Growing along trail edge.
On black locust