Papaver somniferum
Codeine, or 3-methylmorphine, is an alkaloid found in the opium poppy, "Papaver somniferum" var. "album", a plant in the family Papaveraceae. Opium poppy has been cultivated and utilized throughout human history for a variety of medicinal (analgesic, anti-tussive and anti-diarrheal) and hypnotic properties linked to the diversity of its active components, which include morphine, codeine and papaverine.