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Total Plants: 490
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Plant Low PPM High PPM StdDev *Reference
Cinnamomum sieboldii Bark -- 360.0 1.7 *
Zingiber officinale Rhizome 106.0 350.0 1.5 *
Cynanchum atratum Root -- 341.0 3.5 *
Fallopia japonica Plant 59.0 330.0 1.7 Chem. & Pharm. Bull. 38: 2205.
Akebia quinata Stem -- 310.0 -1.0 *
Acorus calamus Rhizome -- 309.0 1.2 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.
Rhizophora mangle Leaf -- 300.0 0.0 *
Rubus chingii Fruit -- 287.0 1.5 *
Crocus sativus Silk Stigma Style -- 284.0 1.0 USDA's Ag Handbook 8 and sequelae)
Cocos nucifera Seed 9.0 281.0 2.8 *
Elettaria cardamomum Fruit 66.0 280.0 1.4 *
Annona squamosa Leaf -- 253.0 -0.0 *
Vaccinium vitis-idaea Fruit 28.0 250.0 1.2 *
Asiasarum heterotropoides Root 120.0 248.0 2.4 *
Asiasarum sieboldii Root 120.0 248.0 2.4 *
Lactuca sativa Leaf 1.0 240.0 -0.1 *
Vigna unguiculata Seed 5.6 240.0 2.3 *
Siegesbeckia orientalis Plant -- 231.0 1.0 *
Helianthus tuberosus Tuber 3.0 228.0 2.2 *
Eriobotrya japonica Leaf -- 224.0 -0.1 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.
*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.