Plant I.D. ?

I found this huge leaved plant growing along the bluffs of the Mississippi here and was just wondering if anyone could I.D. it for me ? I’ve seen this a few times while out scouting and never have figured it out. It’s in the center of the photo.
Thanks

Uncle Dave

Did you gt a bigger picture of the leafs?

No I didn't Gotrek but I'm going back up to the cabin this weekend and will get some better photos. Thanks for the reply

Uncle Dave

Here are more photos of this strange plant. I hope it helps !

Uncle Dave

It's called Leafcup - Thank-you Kevin Wells !

Uncle Dave