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Coneflower Echinacea sp. This perennial can be found in prairies, glades, woods, and thickets, and is often cultivated as well. Its leaves are stiff and lance-shaped to oval. Its flowers contain a cone-shaped center with rays spreading from it. The rays are often purple or white. Many Native American tribes used the coneflower. It was used to treat snake and spider bites, cancers, toothaches, burns, sores, wounds, colds, and the flu. Now the coneflower is used as an immune system stimulant. http://www.herbalextractsplus.com/echinacea-angustifolia.cfm http://www.herbalextractsplus.com/echinacea-purpurea.cfm http://theplantencyclopedia.org/wiki/Echinacea http://www.nrcresearchpress.com/doi/abs/10.1139/Y07-110 http://www.ncbi.nlm.nih.gov/pubmed/16437427/
