The "Gympie Stinger" is the deadliest plant in the world.

The statement is false because the Gympie stinger, also known as the stinging tree, is not actually the deadliest plant in the world. While its stings are highly painful and can cause severe reactions in humans, there are other plants that possess far more lethal toxins, such as the Ricinus communis (castor oil plant), which produces ricin, a deadly poison. Therefore, the Gympie stinger is not the deadliest plant in the world.