Nicotiana rustica, Aztec tobacco or strong tobacco, called ucuch in southern Mexico (specifically Campeche and Yucatán) due to its Mayan roots, mapacho in South America, and thuoc lao (thuốc lào) in Vietnam, is a rainforest plant in the Solanaceae family. It is a very potent variety of tobacco. The high concentration of nicotine in its leaves makes it useful for producing pesticides.