Manchineel tree (mancinella, Hippomane mancinella), which is often called the “tree of death”:
This tree grows in the Caribbean region, Central America, and southern Florida. Almost all of its parts are poisonous: the sap causes severe skin burns, the smoke from burning wood is toxic, and the fruits, which resemble small apples, can be deadly if ingested. 
Especially treacherous is that during rain it is not even recommended to stand under its canopy: water droplets can mix with the tree's toxic sap and cause skin burns. 
Fruit
Visually  it resembles a small green‑yellow apple, which is why the tree received the Spanish name manzanilla de la muerte — “little apple of death”. 
This tree must not be cut down, must not be burned, must not be consumed. The question remains: why isn’t it destroyed so that the tree doesn’t harm people!...