Also called “cutting grass,” and it hurts. Brushing past it isn’t bad, but anything more than that and the welts and the sting last for hours, even after washing, Neosporin with pain relief, maximum strength cortisone cream, and some local and liberally-applied oil-based remedy. I inadvertently leaned a shin into some and when the shock-fog cleared I thought I’d been bitten by something fatal. (Apparently whilst in the fog I asked someone if I was going to die from it and he thought it was hilarious.)Seriously, if you leave a beaten trail, and even alongside beaten trails, be on the lookout, and don’t touch it.It seems to like open rocky ground (along the rivers, crevices in rock walls), but I spotted it everywhere. Average height seemed to be 2-3 feet – what’s pictured is small.