One of the most toxic plants, deadly nightshade contains the alkaloids atropine and scopolamine, which can be fatal if ingested.
All parts of the oleander plant, including leaves and flowers, contain toxic cardiac glycosides that can cause severe poisoning and even death.
The seeds of the castor bean plant contain ricin, a potent toxin that can be lethal if ingested or injected.
Consuming this plant's leaves or stems can lead to tremetol poisoning, which affects the nervous system and can be toxic to livestock and humans.
This ornamental plant contains alkaloids such as scopolamine and atropine, which can cause hallucinations, paralysis, and even death if ingested.
Considered one of North America's most poisonous plants, water hemlock contains cicutoxin, a highly toxic compound that can cause seizures and respiratory failure.
While foxglove is known for its attractive flowers, it contains cardiac glycosides that can disrupt heart function if ingested.
Similar in appearance to edible plants like parsley, poison hemlock contains coniine, a toxic alkaloid that affects the nervous system and can be deadly if ingested.