6 Dangerous Plants You Should Never Touch

Pain bush

Also known as African poison ivy, the pain bush is native to southern Africa and lives up to its name. The plant is a shrub or small tree and exudes a creamy sap that is laden with chemicals known as heptadecyl catechols. Contact with the sap, which turns black when dried, causes a livid swollen rash with blisters, though some lucky people are immune. The symptoms usually subside after a few days.

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