Tiffany, Aegopodium podagraria doesn't seem like a strong match, but I haven't found anything more likely, either. I guess this one goes on the spring list of "things to check".

Saniculal canadensis?

And...get photos of the entire plant next time :)

Thanks weedwoman, but Sanicula doesn't look right. And...dbarron, that is the entire plant - two full stems from the ground.

I thought perhaps Actaea pachypoda but not a match. Something in Ranunculaceae? It looks so familiar.

It was the only thing that came to mind, so might as well say that instead of just "bump." Best luck!

Aegopodium was my first reaction too. But the edge of a swamp in Arkansas seems an odd place for it.

If these are basal leaves, browsing through a key like Newcombs ignoring the flower portion and focusing on the basal leaf choices can help. I've done it on occasion when there are no flowers and Newcomb's is an awesome key.

This plant is familiar. I waited a day before saying anything in hopes it would spring to mind but no dice. The part of me that thinks it is familiar, thinks it likes wet feet.

I wonder if it's in the parsley family, like wild parsnip?

Aegopodium is in the Apiaceae and it does have the look of a member of that family. A picture of the whole plant in situ would be useful.

Just received confirmation from one of our Arkansas botanists. The photo above shows new basal leaves of Rudbeckia laciniata.

Thanks for the update. No wonder they looked familiar to me, I have grown this plant for years.