Is also known as: purple coneflower, coneflower, and American coneflower. It is used for treating or preventing colds, flu, and other infections. It is believed to stimulate the immune system to help fight infections. Less commonly, Echinacea has been used for wounds and skin problems, such as acne or boils. Echinacea has been shown to benefit in the treatment of upper respiratory infections.

Source:  National Center for Complementary and Alternative Medicine.