Plantwise, you can swing a dead cat and find Ludwigia palustris, Lysimachia nummularia and
Persicaria hydropiperoides most wet places here in Ohio. With a bit of persistence, you can find Penthorum sedoides as well. I've seen hair grass (probably Eleocharis parvula) as well. If you make it up to NE Ohio, I'd be happy to go plant hunting with you.