Common Motherwort is easy to identify. It's not a native species to Indiana, and like a lot of non-natives, it doesn't have many predators, and stays fresh looking for a long time. It's a mint that always grows in bunches. It has perfect looking leaves with a nice symmetry. The flowers, and then the seed pods, grow in the axils of the leaves.
The plants grow in bunches, perhaps just one plant with many shoots