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Every part of the Manchineel tree is poisonous, including its leaves, bark, fruit, and sap. Simply brushing against the leaves can cause severe skin irritation, and ingesting any part of the tree can be fatal.
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The seeds of the Strychnine tree contain the toxin strychnine, which is a highly poisonous alkaloid. Strychnine poisoning can cause muscle spasms, seizures, and death.
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The Sandbox tree has poisonous sap that can cause severe skin irritation and blistering. The fruits of the tree also explode when ripe, scattering seeds at speeds of up to 150 miles per hour.
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The seeds of the Cerbera odollam tree contain a toxin called cerberin, which is a cardiac glycoside that can cause heart failure and death.
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All parts of the Oleander plant are poisonous, but the leaves are the most toxic. Ingesting Oleander can cause nausea, vomiting, diarrhea, and heart problems.
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Poison oak contains an oily resin called urushiol, which can cause a severe allergic reaction in many people. Symptoms of a poison oak reaction include itching, redness, and swelling of the skin.
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Poison ivy also contains urushiol, and can cause the same allergic reaction as poison oak.
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Poison sumac is the most toxic of the three poison ivy plants. It can cause the same allergic reaction as poison oak and poison ivy, but it can also cause more severe symptoms, such as fever, blistering, and difficulty breathing.
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The Bunya pine produces large cones that can weigh up to 20 pounds. When the cones fall from the tree, they can cause serious injuries, or even death.
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The seeds of the Horse chestnut tree are poisonous. Ingesting just a few seeds can cause nausea, vomiting, diarrhea, and seizures.
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