Mexican oregano is a relative of lemon verbena. Native to Mexico, it also grows in Central and South America and is sometimes referred to as Puerto Rican oregano. Although this herb shares the basic pungent flavor of Mediterranean oregano, it also has notes of citrus and mild licorice. Used fresh or dry, Mexican oregano pairs well with chile peppers, cumin, and paprika. Add it to Latin American dishes, Tex-Mex chili, and salsa.