Echinacea, or purple coneflower, is an herb traditionally used in some Native American medicinal practices for wound healing. [See more] Echinacea purpurea and Echinacea angustifolia are two of the most common varieties used today in natural medicine for immune support. Debra G. Bell, MD, an integrative medicine family physician and co-director of education at the Osher Center for Integrative Health at UW Medicine in Seattle discusses safe and effective dosages for regular use.