Dendrocnide moroides, commonly known in Australia as the stinging tree, stinging bush, or gympie-gympie, is a plant in the nettle family Urticaceae found in rainforest areas of Malesia and Australia.[3] It is notorious for its extremely painful and long-lasting sting.
Trees are also essential for insects, bird and animal life in cities. They are psychologically calming for people as well.
https://en.wikipedia.org/wiki/Dendrocnide_moroides
Depends on the tree.