Dysphania ambrosioides, formerly Chenopodium ambrosioides, known as wormseed, Jesuit’s tea, Mexican-tea, payqu (paico), epazote, mastruz, or herba sanctæ Mariæ, is an annual or short-lived perennial herb native to Central America, South America.
Is used as a herb, and herbal tea for its pungent flavor. Raw, it has a resinous, medicinal pungency, similar to oregano, anise, fennel, or even tarragon, but stronger. The fragrance of D. ambrosioides is strong but difficult to describe. A common analogy is to turpentine or creosote. It has also been compared to citrus, savory, and mint.