Echinacea, also known as coneflowers, is a genus of plants from the daisy family, which can be found mostly in North America. Three species, E. Purpurea, E. Angustifolia and E. Pallida have been used as folk medicine, and some of them are used since the 18^th century. Echinacea is known to have immunomodulatory properties, and the most common therapeutic use attributed to Echinacea is the treatment of common cold.