Thank you for that suggestion. I took a look around and wikipedia doesn´t show any species native to South America. Of course even though it was well out into the woods that´s no guarantee it´s not an escaped alien plant.
Lila I think you nailed it. Thank you. Here´s a link that shows an image just like mine and it appears to native to my area. http://biogeodb.stri.si.edu/bioinformatics/dfm/metas/view/15246