I posted this on Dave's, but didn't get a response. I bought this philodendron at TX A&M 5 yrs ago. I planted it at the base of oak tree, and covering it with a blanket during our mild winters was enough protection....except for this winter. I did manage to cut a section off before the freeze to root. There was no ID on it when I bought it and the students didn't know what it was. The leaves are at least 18" long. The leaves were about half that size when I bought it. It's/was growing up the tree with a Beaumontia.