My DH used to run into a plant time and again walking through the woods. He said it made whatever part of his body that touched it..usually his arm, go numb in places. Not tingly, just numb. Some old timer told him it was numb weed. I have never heard of such or encountered it and I crawled all over the mountains as a child. And if I Google "numb weed" all I get is sites about pot. Has anyone heard of numb weed? Could it just be a strange reaction to a stinging nettle? He won't let me "sting" him with nettles to find out. Wuss. Nettles only zing me for a minute or two and then it fades.