Echinacea a purple coneflower that’s native to the Americas. The roots of the flower are often prepared as an immune booster. It was originally used by the Native American Indians and became popular in the 1900s in North America. It’s been shown that echinacea increases white blood cell count. It’s also been shown to significantly increase phagocytosis which is the process where cells attack pathogens in the body. Thanks for the comment. We probably should have added additional information. You can get echinacea in a liquid extract or dried in capsules. It’s also available as a tea.