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Total Plants: 490
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Plant Low PPM High PPM StdDev *Reference
Cnidium officinale Rhizome -- 30.0 -0.6 *
Cocos nucifera Seed 9.0 281.0 2.8 *
Coix lacryma-jobi Seed -- 26.0 -0.3 Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195.
Colocasia esculenta Root 1.3 7.6 -0.5 *
Colocasia esculenta Leaf -- 45.0 -0.4 *
Coptis spp Rhizome 260.0 398.0 1.8 *
Coptis japonica Rhizome 260.0 398.0 1.8 *
Coptis chinensis Rhizome 260.0 398.0 1.8 *
Coriandrum sativum Leaf -- 64.0 -0.4 USDA's Ag Handbook 8 and sequelae)
Coriandrum sativum Fruit 18.0 19.0 -0.3 *
Cornus officinalis Fruit -- 11.0 -0.3 *
Corylus avellana Seed 16.0 100.0 0.6 *
Crataegus cuneata Fruit -- 12.0 -0.3 *
Crataegus rhipidophylla Fruit -- 14.0 -0.3 Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp.
Crataegus laevigata Flower -- -- *
Crataegus laevigata Fruit 0.4 1.4 -0.4 *
Crocus sativus Silk Stigma Style -- 284.0 1.0 USDA's Ag Handbook 8 and sequelae)
Cucumis melo Fruit 0.4 7.7 -0.4 *
Cucumis sativus Fruit 0.5 98.0 0.2 *
Cucurbita spp Fruit 1.0 27.0 -0.2 *
*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.