Mexican marigold

Tagetes lucida.  Leaf and flower. 

Mexican marigold (Tagetes lucida) is an herb native to Mesoamerica, known for its medicinal benefits. Studies have shown that compounds found in this plant are effective for treating headaches, digestive issues, and respiratory infections.  The plant contains unique compounds, including unique derivatives of thiophene, which have demonstrated antibacterial, analgesic, and anti-inflammatory properties. 

The leaves have a tarragon like scent and can be used as a culinary substitute for tarragon in soups and stews. 

This article contains lot more information on the historical and contemporary uses of tagetes lucida by the indigenous peoples of mesoamerica.