This one is the only thing that concerns me, being that it is the typical 3 leaves like poison ivy does. It's under my deck and that part is open and easily could be touched by anyone. If it had more than 3 leaves then I would feel better about it, but that's what keeps me concerned. If I need to pull it up I will gladly do that. I've read a lot about poison ivy and how the middle stem is bigger than the sides and obviously that is the case here as well. If you could let me know what makes you think it is something other than that, that I'm just unaware of that would be great!