Source: https://www.amazon.com/Frontier-ORGANIC-Echinacea-Purpurea-Sifted/dp/B0012BZBD2/ref=as_li_ss_tl?ie=UTF8&qid=1483309716&sr=8-1&keywords=echinacea+leaf&linkCode=ll1&tag=wellnessmama-20&linkId=e5aaa08e3e2c8ac5f00f42980ca45430