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Total Plants: 3
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Plant Low PPM High PPM StdDev *Reference
Piper nigrum Fruit Essent. Oil -- 1400.0 *
Ocimum gratissimum Plant -- -- Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980.
Arctium lappa Root -- -- Jim Duke's personal files.
*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.