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Total Plants: 510
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Plant Low PPM High PPM StdDev *Reference
Tectona grandis Wood -- 10000.0 5.1 *
Spondianthus preussii Stem Bark -- 12000.0 4.7 Jim Duke's personal files.
Nuytsia floribunda Shoot -- 17000.0 3.9 *
Psophocarpus tetragonolobus Root -- 53000.0 3.8 Jim Duke's personal files.
Diospyros perigrina Bark 25000.0 30000.0 3.4 *
Sanguisorba officinalis Stem -- 1100.0 2.8 Jim Duke's personal files.
Wormia burbidgei Bark -- 24000.0 2.5 *
Tetracera scandens Leaf -- 13500.0 2.3 Jim Duke's personal files.
Arbutus menziesii Plant -- 20000.0 2.1 Pavannasasivam, G., & M.U.S. Sultanbawa. 1974. Betulinic acid in the Dilleniaceae and a review of its natural distribution. Phytochem. 13:2002-2006.
Arbutus menziesii Plant -- 20000.0 2.1 Pavannasasivam, G., & M.U.S. Sultanbawa. 1974. Betulinic acid in the Dilleniaceae and a review of its natural distribution. Phytochem. 13:2002-2006.
Lemaireocereus griseus Plant -- 20000.0 2.1 *
Dillenia retusa Fruit -- 16000.0 2.0 Jim Duke's personal files.
Tetracera sarmentosa Leaf -- 12300.0 2.0 Jim Duke's personal files.
Cornus florida Bark -- 20000.0 2.0 Jim Duke's personal files.
Cornus florida Bark -- 20000.0 2.0 Pavannasasivam, G., & M.U.S. Sultanbawa. 1974. Betulinic acid in the Dilleniaceae and a review of its natural distribution. Phytochem. 13:2002-2006.
Ternstromia merriliana Bark -- 20000.0 2.0 *
Ceanothus americanus Root Bark 200.0 7279.0 1.9 Jim Duke's personal files.
Platanus acerifolia Bark -- 18000.0 1.7 Jim Duke's personal files.
Platanus accrifolia Bark -- 18000.0 1.7 Pavannasasivam, G., & M.U.S. Sultanbawa. 1974. Betulinic acid in the Dilleniaceae and a review of its natural distribution. Phytochem. 13:2002-2006.
Eurya acuminata Bark -- 18000.0 1.7 *
*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.