dangerous hogweed can cause significant damage to skin health

allergen berenklauw blisters burns danger dangerous destroy edema environment epidermis flat flower flowering furanocoumarins giant grass hands harmful heracleum hogweed huge illustration irritation isolated leaf leaves manden mantegazzianum outdoor outdoors photodermatitis photosensitization phototoxic phytophotodermatitis poisonous psoralen season skin sosnowski summer toxic vector weed wildflower