The “Hall of Fame” (The 10 Most Lethal) These are the species most commonly cited by toxicologists as having the highest fatality potential: • Oleander (Nerium oleander): Contains cardiac glycosides. Even a single leaf can be fatal to a child. • Water Hemlock (Cicuta maculata): Often called the most “violently toxic” plant in North America;… Continue reading Toxic plants in the world