Belladonna (Atropa belladonna): Also known as deadly nightshade, this plant contains toxic alkaloids that can be fatal if ingested, causing hallucinations and paralysis.
Oleander (Nerium oleander): All parts of the oleander plant contain cardiac glycosides, which can cause severe cardiac symptoms if ingested and potentially lead to death.
Aconite (Aconitum spp.): Often referred to as monkshood or wolf's bane, aconite contains potent neurotoxins that can cause cardiac arrest and other severe symptoms.
Strychnine Tree (Strychnos nux-vomica): The seeds of this tree contain strychnine, a powerful neurotoxin that affects the central nervous system and can be lethal in high doses.
Suicide Tree (Cerbera odollam): Found in tropical regions, the seeds of this tree contain a toxic cardiac glycoside called cerberin, known for its use in suicides.
Rosary Pea (Abrus precatorius): The seeds of the rosary pea contain a potent toxin called abrin, which can cause organ failure and be deadly if ingested.
Hemlock (Conium maculatum): Hemlock contains the toxin coniine, which affects the central nervous system and can lead to paralysis and respiratory failure.
Deadly Galerina (Galerina marginata): A highly toxic mushroom that resembles edible species, it contains deadly amatoxins that can cause liver and kidney failure.