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The castor bean plant contains ricin, a protein so lethal that a mere 4-8 seeds can kill an adult human.
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Commonly called deadly nightshade, it contains toxins that can cause hallucinations, convulsions and death within 24 hours of ingestion.
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The strychnine tree produces seeds containing strychnine, causing painful muscle spasms and death by asphyxiation.
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Water hemlock contains cicutoxin that attacks the central nervous system, causing violent seizures and death within hours.
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Known as monkshood or wolfsbane, it contains aconitine that can cause fatal heart arrhythmias even through skin contact.
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The manchineel tree has caustic sap that causes severe chemical burns and fruits so toxic that a single bite can be fatal.
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White snakeroot contains tremetol that causes "milk sickness", which famously killed Abraham Lincoln's mother.
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The rosary pea contains abrin, which is even more potent than ricin and can kill with just a single well-chewed seed.
So, make sure you steer clear of these deadly plants!
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