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Total Plants: 301
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Plant Low PPM High PPM StdDev *Reference
Pyrus communis Fruit 43.0 19700.0 3.3 *
Solidago gigantea Plant -- 21980.0 2.4 *
Teucrium scorodonia Leaf -- 20000.0 2.1 List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979.
Carum carvi Seed -- 2840.0 1.9 *
Ocimum basilicum Leaf -- 19100.0 1.9 *
Euphrasia officinalis Shoot -- 6000.0 1.7 Jim Duke's personal files.
Thymus vulgaris Leaf -- 16900.0 1.6 *
Valeriana officinalis Root -- 5800.0 1.6 *
Origanum majorana Leaf -- 14100.0 1.2 *
Pimpinella anisum Seed -- 2060.0 1.2 *
Ipomoea purga Tuber 30000.0 40000.0 1.0 *
Helianthus annuus Seed 1600.0 1800.0 1.0 *
Euphrasia officinalis Plant -- 11500.0 0.7 Tyler, V.E.. 1982. The Honest Herbal. George F. Stickley Co., Philadelphia PA. 263 pp.
Verbena officinalis Leaf -- 10000.0 0.7 *
Artemisia dracunculus Leaf -- 7640.0 0.3 *
Equisetum arvense Plant -- 8000.0 0.2 *
Arctium lappa Root -- 2500.0 0.2 *
Malus domestica Fruit 85.0 1270.0 -0.1 *
Thymus serpyllum Plant -- 6200.0 -0.1 List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979.
Origanum vulgare Plant -- 6000.0 -0.1 *
*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.