I've had an invasive plant in my front yard for 4 summers. It took over. We pulled it the first 2 years, (no rash or anything), dug it up the third, and I finally had to spray it to get rid of it as it still came back. I go to the 4-H garden on campus all the time. There were 3 or 4 of these plants randomly growing in that garden last year, so am pretty sure it isn't poisonous. But WHAT THE HECK IS IT??? I canNOT find it anywhere online. It's not hogweed or anything else toxic. Bees love it. It even choked-out bee balm, giant sedum and other wonderful things. I now have a bare front yard...but would LOVE to know what the HECK it is! Sorry, no photo; I didn't think it would be an issue large enough to record. Thank you. Go GREEN!