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Total Plants: 413
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Plant Low PPM High PPM StdDev *Reference
Petroselinum crispum Plant 1.0 12.0 -0.2 *
Petasites japonicus Plant 15.0 16.0 0.2 Chem. & Pharm. Bull. 38: 2205.
Persea americana Fruit 2.0 11.0 -0.1 *
Perilla frutescens Plant -- 17.0 0.3 Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195.
Peganum harmala Plant -- 9.0 -0.6 *
Pastinaca sativa Root 0.8 12.0 0.0 *
Papaver somniferum Seed 16.0 23.0 0.7 *
Panax ginseng Root -- 17.0 0.6 *
Panax ginseng Flower -- -- *
Panax ginseng Stem -- -- *
Panax quinquefolius Plant 6.0 13.0 -0.1 *
Panax ginseng Inflorescence -- -- *
Panax ginseng Leaf -- -- *
Panax japonicus Rhizome -- 6.0 -1.0 *
Panax ginseng Fruit -- -- *
Paeonia lactiflora Root 3.0 6.0 -0.6 *
Paeonia suffruticosa Root Bark 5.0 6.0 -0.8 *
Paeonia moutan Root Bark 5.0 6.0 -0.8 *
Pachyrhizus erosus Tuber 4.0 25.0 1.9 *
Origanum vulgare Plant -- 9.0 -0.6 USDA's Ag Handbook 8 and sequelae)
*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.