World's Most Poisonous Plants 

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1. Castor Bean 

The seeds of the castor bean plant contain ricin, one of the deadliest plant toxins.  

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2. Deadly Nightshade 

All parts of this plant are highly toxic, containing tropane alkaloids such as atropine, scopolamine, and hyoscyamine. 

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3. Oleander 

Oleander is a common ornamental plant with highly toxic leaves and flowers. 

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4. Angel's Trumpet 

This plant produces trumpet-shaped flowers that contain alkaloids like scopolamine and atropine. 

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5. Water Hemlock 

Water hemlock is one of the most poisonous plants in North America. 

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6. Datura 

Datura plants contain tropane alkaloids like scopolamine and atropine. 

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7. Jimsonweed 

Also known as Devil's Trumpet, this plant contains tropane alkaloids. 

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8. Suicide Tree 

Found in tropical regions, this tree's seeds contain a toxic cardiac glycoside called cerberin. 

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9. Manchineel 

Native to tropical areas, the manchineel tree is known as "the tree of death." 

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10. White Snakeroot 

White snakeroot contains a toxin called tremetol, which can be transferred to humans through the consumption of contaminated milk or meat. 

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