Tobacco (Nicotiana tabacum)
Tobacco is the most widely grown commercial non-food plant in the world. All parts of the plant, especially its leaves, contain the toxic alkaloids nicotine and anabasine, and can be fatal if eaten. Despite its designation as a cardiac poison, nicotine from tobacco is widely consumed around the world and is both psychoactive and addictive. Tobacco use causes more than 5 million deaths per year, making it perhaps the most deadly plant in the world