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Total Plants: 3
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Plant Low PPM High PPM StdDev *Reference
Echinacea purpurea Root 15.0 60.0 Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp.
Echinacea angustifolia Root 15.0 60.0 Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp.
Echinacea spp Plant -- 15.0 *
*Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.