Answer: Australia
Notes: The Gympie-Gympie, or Dendrocnide moroides, is the world's most toxic plant, native to Australia. It can grow up to 10 meters tall and has needle-like hairs that cause excruciating stings. The sting feels like electrocution and burning, and the pain can last weeks or months, sometimes up to a year. The plant's toxins worsen with water or temperature changes. Expert care is provided, and visitors are warned not to touch it.
