Tennesse Tree

[Pullinchips]

sorry to all who already guessed this, posted my reply after reading the initial post, then scrolled down to see the pic and what others said.  But anyway i feel that it is a big leaf mag. after seeing the pic. they can grow in moist areas have huge "umbrella" like leaf arrangement like said before and a paw paw like said also has much smaller leaves (not anywhere near 18").  Did not want my post to appear like i was just repeating what others had said.

[SwampDonkey]

Well you did good because I had to look it up. I've been in areas it grows in, but never saw it.