Herbal Power , Fires up the immune system. , , Taste , Mildly minty with a twist of citrus. , , Plant Story , Native American tribes have been using echinacea, or purple coneflower, for hundreds of years before it made its way into Western herbalism. Today, it is one of the most widely studied herbs for its ability to promote a healthy immune response. Have some on hand for when you need a boost of wellness.