I am in the florida panhandle in zones 8-9. There are only 2 of these in my yard and they are seperate from eachother about a good 20 meters. The whole area was underwater before but now is dry with trees planted by people, but these 2 trees are unlike the others. This is what one of them looks like http://i56.photobucket.com/albums/g191/jamespcgamer/053110111814.jpg
Y. guatamalensis, Y. elephantipes, and Y. rostrata are all common in plantings in the southern States, but without seeing more trunk (which will happen as the plants age) or flowers, it will be difficult to make a determination.
