Giant Stinging Tree (Dendrocnide Moroides)
Also known as the stinging brush or the suicide plant, these broad leaves pictured above contain millions of silica type hairs that become lodged in the skin. If inhaled they embed themselves in your lungs. Why is this a problem, you may ask? Because like most things in Australia, it causes severe pain that is difficult to stop. In fact, the extremely painful stinging sensation can last anywhere from days to years as the injured area becomes covered with small, red spots joining together to form a red, swollen welt.
The only known remedy is to apply hydrocloric acid to the affected area and a hair removal strip. Be careful to wax the hairs out full intact as broken tips lodged deep in the skin will only cause more pain.