Manchineel (Hippomane mancinella) is known as the world’s most dangerous tree. It is a member of the spurge family. It is found in Florida Everglades and the Caribbean coast. The sap or the trunk of the tree exudes some very poisonous and acidic substances that the merest contact with human skin causes a breakout of blisters, and blindness can occur if it touches a person’s eyes. Even standing under it can be very dangerous, especially when it is raining. Standing under it alone with raindrops is enough to cause blistering of the skin if that person is wetted by raindrops containing any sap.
In addition to this, a single bite of its small green apple-like fruit causes blistering and severe pain, and can prove fatal. And if one of these deadly trees is burned, the resulting smoke can cause blindness if it reaches a person’s eyes.