Question: what are some common poisonous plants?
Answer: Water Hemlock (Cicuta maculata) ... 
Deadly Nightshade (Atropa belladonna) ... 
White Snakeroot (Ageratina altissima) ... 
Castor Bean (Ricinus communis) ... 
Rosary Pea (Abrus precatorius) ... 
Oleander (Nerium oleander) ... 
Tobacco (Nicotiana tabacum)