Nicotine, a naturally occurring alkaloid, is commonly associated with tobacco (Nicotiana tabacum), but it is also found in varying concentrations across many other plants. These plants, many of which belong to the Solanaceae family. Plants With High Nicotine Content Tobacco (Nicotiana tabacum) The primary source of commercial nicotine, tobacco contains the highest concentration of nicotine … Continue reading 21 Plants With High Nicotine Content (With Pictures)