plant Epazote (Dysphania ambrosioides)

Dysphania ambrosioides, formerly Chenopodium ambrosioides, known as wormseed, Jesuit's tea, Mexican-tea, payqu (paico), epazote, mastruz, or herba sancti Mariæ, is an annual or short-lived perennial herb native to Central America, South America, and southern Mexico.
 

Although it is traditionally used with black beans for flavor and its supposed carminative properties (less gas), it is also sometimes used to flavor other traditional Mexican dishes: it can be used to season quesadillas and sopes (especially those containing huitlacoche), soups, mole de olla, tamales with cheese and chili peppers, chilaquiles, eggs and potatoes and enchiladas. It is often used as an herb in white fried rice and an important ingredient for making the green salsa for chilaquiles.