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  1. Chemid

  2. Ubiquitous

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    Total Plants: 3
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    Plant Low PPM High PPM StdDev *Reference
    Echinacea pallida Plant -- -- *
    Echinacea pallida Root -- -- Jim Duke's personal files.
    Echinacea spp Root -- -- Economic & Medicinal Plant Research, 5: 253.
    *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.