THIS PLANT IN AN ALIEN INVADER OF DITCHES AND PRAIRIES. IT CAN GROW UP TO 5+ FT. AND CAUSES A BURN LIKE RASH TO THE SKIN. THE COMBINATION OF JUICE FROM THE LEAF OR FLOWER OF THE PLANT, SUNLIGHT, AND SWEAT CREATES AN ALMOST ACID LIKE COMPOUND THAT BURNS THE SKIN. I HAVE HAD THESE BURNS LAST OVER A YEAR. NOTE THAT IS LOOKS SOMEWHAT LIKE THE NATIVE SPECIES OF PRAIRIE PLANT CALLED GOLDEN ALEXANDER.