Mexican Tarragon (Tagetes lucida) is famed for tarragon-and-anise scented leaves that are useful as a spice or as a tea. The plant has some frost tolerance and is perennial in some climates, especially if sheltered. It grows to 3 feet tall and bears abundant, highly fragrant, golden yellow blossoms in August and September. A member of the marigold family, it's also called Mexican Marigold.