Michael Tierra, C.A.,N.D. in his book “The Way of Herbs” says this: “Echinacea angustifolia is probably more potent and is most commonly mentioned as the plant used in traditional Native American medicine. Both have similar properties. However, Echinacea purpurea is more readily available and about one third the price of Echinacea angustifolia. Thus most herb stores will provide products made from Echinacea purpurea.”

I personally have used both species and in my mind there is no comparison. I prefer echinacea angustifolia.