Mexican oregano

Lippia graveolens, a species of flowering plant in the verbena or vervain family, Verbenaceae, is native to the southwestern United States, Mexico, and Central America as far south as Nicaragua. Common names include: Mexican oregano, redbrush lippia, orégano cimarrón, scented lippia, and scented matgrass. The specific epithet is derived from two Latin words: gravis, meaning 'heavy', and olens, meaning 'smelling'. It is a shrub or small tree, reaching 1–2.7 m in height. Fragrant white or yellowish flowers can be found on the plant throughout the year, especially after rains.