Philodendron tweedieanum is a large meconostigma type of phioldendron. Mature plants produce large hastate trangular leaves that can grow 2 to 3 feet long and wide. Plants will grow trunks with age. It is one of the few Philodendrens that can naturely grow in bogs or water.  This plant was grown from seed that was given to me by Leland Miyano and is not often seen avaible.