Courtesy of my neighbor who sometimes brings me odds and ends to shoot. =) Common names are Mohr's Eupatorium or Mohr's Thoroughwort. I think this is the correct species. More info here - http://namethatplant.net/plantdetail.shtml?plant=3474
@kvphoto Thank you, KV! This was a hard one to get a good focus on. The stem of it my neighbor brought me is about as big as three dozen roses in a vase.