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Updated by odalysduenez15 on May 16, 2017
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Top Ten Poisonous Plants

Here are the top ten poisonous plants for educational purposes!

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10.) White Snakeroot

10.) White Snakeroot

This plant is also known White Sanicle this plant also a high percentage of the toxin tremetol. This is not known for killing humans directly, but indirectly. When the plant is eaten by cattle, the toxin is absorbed into their milk and meat. When humans then consume it, eat the beef or drink the milk, the toxin enters the body and causes something called milk sickness, which is highly fatal.

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9.) Doll's Eyes

9.) Doll's Eyes

This plant is also known as White Baneberry, is a plant that is found native to Eastern and Northern North America. Although the whole plant has been declared toxic for human consumption, the most poisonous part is the concentrated toxins in the fruit, which have claimed a number of children’s lives, as they also have a sweet taste. The berries contain a carcinogenic toxin, which has an almost immediate, sedative effect on human cardiac muscles and can easily cause a quick death

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8.) Angel's Trumpets

8.) Angel's Trumpets

All parts of the plant contain toxins, such as tropane alkaloids scopolamine and atropine. The plant is sometimes turned into a tea and ingested as a hallucinogenic, recreational drug. As levels of toxicity varies from plant to plant, and part to part, it is almost impossible to know how much toxins you have ingested. As a result of this, many users have overdosed and died from it.

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7.) Strychine Tree

7.) Strychine Tree

The small seeds inside the trees’ green to orange fruit, is highly toxic, being filled with poisonous alkaloids’ Strychnine and Brucine. 30 mg of these toxins are enough to be fatal to an adult, and will lead to a painful death from violent convulsions due to simultaneous stimulation of sensory ganglia in the spine.

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6.) English Yew

6.) English Yew

The berry armor is the only part of the fruit that is not poisonous and this allows birds to eat the fruit and spread the seeds without ill effect. It takes a dose of about 50g to be fatal to a human. Symptoms include difficulty breathing, muscle tremors, convulsion, collapse and finally cardiac arrest. In cases of severe poisoning, death can set in so fast that the other symptoms are missed.

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5.) Water Hemlock

5.) Water Hemlock

Water hemlock is considered to be North America’s most poisonous plant as it is incredibly poisonous to humans. The plants contain a toxin named cicutoxin which causes seizures. This poison is found in all parts of the plant but is most concentrated in the roots, which is most potent in the spring. Besides the almost immediate seizures, other symptoms include nausea, vomiting, abdominal pains, tremors and confusion. Death is usually caused by respiratory failure or ventricular fibrillation and can occur just a few hours after ingestion.

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4.) Wolfsbane

4.) Wolfsbane

The plant contains very large quantities of a poison called alkaloid pseudaconitine, which used to be used by the Ainu people of Japan as poison for hunting, on the tips of their arrow heads. In cases of ingestion, symptoms, which include burning in the limbs and abdomen, sets in immediately. In cases of large doses, death can occur within 2-6 hours and 20ml is enough to kill an adult human.

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3.) Rosary Pea

3.) Rosary Pea

The poison contained in the plant is very similar to the poison ricin, found in some other poisonous plants. There is one main difference between these poisons, and that is that abrin is about 75 times stronger than ricin. This concludes that the lethal dose is much less, and in some cases as little as 3 micro grams can kill an adult human. Using seeds as beads even poses a huge threat, as people have been known to die, just from pricking their fingers on the drill bits used to drill the tiny holes in the seeds.

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2.) Belladonna

2.) Belladonna

It is also one of the world’s most poisonous plants as it contains Tropane alkaloids, some of which cause delirium and hallucinations. Other symptoms of Belladonna poisoning include loss of voice, dry mouth, headaches, breathing difficulty and convulsions. The whole plant is poisonous, but berries usually play the greatest risk, as they are sweet and tend to attract children. 10 – 20 berries can kill an adult, but it only takes 1 leaf to kill a full grown man.

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1.) Castor Plants

1.) Castor Plants

One raw seed is enough to kill a human in 2 days, which makes for a long, agonizing and unstoppable death. The first symptoms will be experienced within a few hours and will include a burning sensation in the throat & mouth, abdominal pain, bloody diarrhea and vomiting. The process is unstoppable and the final cause of death will be dehydration.