Living in Wyoming, I was thrilled to find out Echinacea was useful for snakebite. Â Online I followed up on what I read and was surprised by the conflicting advice on whether to use angustifolia or purpurea. Â Some of the discussions were quite heated. Â As purpurea is easier to grow, is it helpful with snakebite, or do I need to keep some of both on hand?