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Total Plants: 490
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Plant Low PPM High PPM StdDev *Reference
Cinnamomum sieboldii Root Bark -- 220.0 2.1 *
Cypripedium pubescens Root -- 209.0 1.9 Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp.
Ananas comosus Fruit 12.0 209.0 1.0 USDA's Ag Handbook 8 and sequelae)
Taraxacum officinale Leaf 14.0 206.0 -0.1 *
Avena sativa Seed 20.0 204.0 1.9 Jim Duke's personal files.*
Valerianella locusta Plant 179.0 201.0 0.7 *
Lygodium japonicum Pollen Or Spore -- 191.0 *
Elytrigia repens Plant 43.0 188.0 0.7 *
Isatis tinctoria Root -- 181.0 1.6 *
Perilla frutescens Plant -- 180.0 0.6 Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195.
Taraxacum mongolicum Plant -- 178.0 0.6 *
Juncus effusus Pith -- 171.0 1.0 *
Cinnamomum burmannii Bark -- 170.0 0.5 *
Artemisia vulgaris Plant 160.0 170.0 0.5 Chem. & Pharm. Bull. 38: 2205.
Oenothera biennis Seed 5.0 168.0 1.4 *
Hyoscyamus niger Seed -- 166.0 1.4 *
Viscum album Leaf -- 159.0 -0.2 *
Panax quinquefolius Plant 19.0 156.0 0.4 *
Phaseolus vulgaris Fruit 1.0 150.0 0.6 *
Stevia rebaudiana Leaf -- 147.0 -0.2 Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp.
*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.