Most poisonous plants - top poisonous & deadliest poison plants. Plants that poison, are poisonous, etc. Ways to poison someone that have been around since well before you could research them on the internet. Warning: Don't blame us if you get caught using one of these. Poison your exes, bosses, etc. at your own risk.
It may look like a pretty flower, but poison hemlock (or conium maculatum) is at heart a deadly weapon. Once ingested, it will paralyze various systems in the victim's body, with paralysis of the respiratory system as the usual cause of death. Worst of all, the mind is active until the last breath--so leave the name-calling until you're sure your subject is unresponsive. see more on Hemlock Poisoning
This metalloid element is used in pesticides, but it can do a lot more than just kill insects. Ingesting small amounts over time raises the probability of cancer. For more immediate results, we suggest a high dose which causes stomach cramps, diarrhea, confusion, convulsions, vomiting, and death. Be warned, however: evidence of chronic arsenic ingestion lasts for months or even years later in the victim's hair and fingernails. Dispose carefully. see more on Arsenic poisoning
Macbeth used nightshade to poison an entire army of Danes before becoming King of Scotland, so imagine what the plant can do to a single person. Not only does ingesting it lead to death, but many peculiar symptoms such as complete loss of voice, frequent bending over, continuous movement of the hands and fingers, and dilated pupils. It's said that the poison may be prevented by swallowing a large glass of warm vinegar or mustard and water. So don't keep those around.
Cyanide poisoning is for those who live the fantasy of a mad scientist. Generally delivered in the form of gaseous hydrogen cyanide, potassium cyanide, or sodium cyanide, the poisonous ion makes the cells of an organism unable to use oxygen. In simpler terms: coma, seizures, apnea, cardiac arrest. Beautiful. see more on Cyanide poisoning