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.
