Venus flytrap- Is this plant deadly for humans? find answer in the blog post.
- Western water hamlock (Cicuta douglasii)
The main distinguishable characteristic of western water hemlock is its toxicity. Cicutoxin is the toxin that is produced by the water hemlock, making it the most poisonous plant in North America. It is an unsaturated alcohol that has a major impact on the central nervous system of animals. The toxin initiates tremors, muscular weakness, seizures and respiratory failure. Very small amounts of green materials of W. water hemlock, about .1% of a person’s body weight can even lead to death. Death can occur within fifteen minutes of ingesting this toxin.
- Jequirity (Abrus precatorius
The attractive seeds (usually about the size of a ladybug, glossy red with one black dot) contain abrin, which is related to ricin, and very potent. Symptoms of poisoning include nausea, vomiting, convulsions, liver failure, and death, usually after several days. Ingesting a single seed can kill an adult human. The seeds have been used as beads in jewelry, which is dangerous; inhaled dust is toxic and pinpricks can be fatal.
- Monkshood (Aconitum
All parts are poisonous. The poison is an alkaloid called aconitine, which disables nerves, lowers blood pressure, and can stop the heart. Even casual skin contact should be avoided. It has been used as poison for bullets (by Germany in WWII), as a bait and arrow poison (ancient Greece), and to poison water supplies (reports from ancient Asia). It is usually a quick-acting poison.
- White baneberry (Actaea pachypoda
All parts are poisonous, but especially the berries, the consumption of which have a sedative effect on cardiac muscle tissue and can cause cardiac arrest. The berries are highly poisonous, and the entire plant is considered poisonous to humans. The berries contain cardiogenic toxins which can have an immediate sedative effect on human cardiac muscle tissue, and are the most poisonous part of the plant. Ingestion of the berries can lead to cardiac arrest and death. The berries are harmless to birds, the plant's primary seed dispersers.
- Corn cockle (Agrostemma githago)