"Devil's weed" is a term that refers to several plants with harmful effects such as addiction, hallucination, and potential death. Synonyms for this term include "poison weed," "deadly herb," or simply "poisonous plant." In some cultures, "witches' herb" or "sorcerer's plant" are also used to describe these notorious plants. The well-known psychoactive plant, marijuana, is also sometimes referred to as "devil's lettuce" due to its association with altered states of consciousness. In any case, it is important to recognize that these plants can have serious negative consequences and caution should be exercised when dealing with them.