The 'little apple of death,' a perilous tree in the US with toxic fruit, sap, and smoke, causing severe burns, swelling, internal bleeding, and respiratory complications.
North America's Most Violently Toxic Plant, containing the deadly neurotoxin cicutoxin, causing severe complications including seizures, brain swelling, and death within hours.
Poisonous "Leaves of Three" Plants - Rashes, Burning, Itching, and Indirect Hazards from Resin and Smoke.
Castor Oil Plant
Useful but Deadly - Ricin, one of the most toxic plant chemicals found in its seeds, causing severe symptoms and potential fatality with minimal ingestion.
Deceptively Common, Highly Toxic Plants - Oleander, rosary pea, monkshood, belladonna, and white snakeroot; ingestion leads to stomach pain, headache, diarrhea, and vomiting.