: Its heart-shaped leaves are covered in microscopic, needle-like silica hairs that inject a potent neurotoxin. The pain is described as being simultaneously electrocuted and burned with hot acid.

: The pain can last for weeks, months, or even recur for years because the hairs stay embedded in the skin.

: This species can grow up to 40 meters tall. While its sting is slightly less severe than the Gympie-Gympie, it still causes intense, long-lasting burning pain. Native and Common Nettles

The most notorious "Australian nettles" are the stinging trees, particularly those in the genus Dendrocnide . These plants are known for their extreme toxicity.

: Found primarily in rainforest areas of Queensland and northern New South Wales.

Other plants referred to as nettles are smaller and less dangerous, though they still possess stinging hairs.

: Often called the "suicide plant," it is arguably the most painful plant in the world.