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Total Plants: 413
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Plant Low PPM High PPM StdDev *Reference
Gentiana scabra Root -- 18.0 0.7 *
Geranium thunbergii Plant -- 23.0 1.0 *
Ginkgo biloba Seed 3.0 6.0 -0.8 USDA's Ag Handbook 8 and sequelae)
Glechoma hederacea Plant -- 11.0 -0.3 Chem. & Pharm. Bull. 38: 2205.
Glehnia littoralis Root -- 15.0 0.4 *
Glycine max Seed 4.3 18.0 0.3 *
Glycyrrhiza uralensis Root 13.0 14.0 0.3 *
Helianthus annuus Seed 15.0 19.0 0.4 USDA's Ag Handbook 8 and sequelae)
Helianthus tuberosus Plant 8.0 30.0 1.8 Bonness, M. S., Promising new drugs from plants: poisons that heal, Herbarist, #56, 1990, 59-68
Hibiscus sabdariffa Flower 5.6 6.2 -1.3 *
Hordeum vulgare Seed 1.0 20.0 0.5 Jim Duke's personal files.*
Hordeum vulgare Sprout Seedling -- 8.0 -1.0 Chen, H.C. and Lin, S.M. 1988. Determination of Mineral Elements in Certain Crude Drugs (Part 1), Kaohsiung J. Med. Sci., 4: 259-272.
Houttuynia cordata Plant -- 26.0 1.3 Suziki, A., Morimoto, I., and Okitzu, T., Elution of Metals from Crude Drugs, Shoykugaku Zasshi 36(3):190-195.
Hyoscyamus niger Seed -- 26.0 1.0 *
Inula helenium Plant -- -- *
Ipomoea batatas Root 1.5 7.0 -0.5 *
Ipomoea aquatica Leaf 2.6 19.0 -0.2 *
Isatis tinctoria Root -- 10.0 -0.2 *
Juglans regia Seed 3.0 15.0 0.0 *
Juglans nigra Seed 10.0 20.0 0.5 *
*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.