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Total Plants: 413
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Plant Low PPM High PPM StdDev *Reference
Quisqualis indica Fruit -- 13.0 0.0 *
Raphanus sativus Seed -- 6.0 -0.8 *
Raphanus sativus Root 0.3 8.0 -0.4 *
Rehmannia glutinosa Root -- 4.0 -0.9 *
Rheum rhabarbarum Pt 0.2 5.2 -1.0 *
Rheum palmatum Rhizome 6.0 10.0 -0.1 *
Rhizophora mangle Leaf -- 35.0 0.2 *
Rhus glabra Stem 0.6 20.0 -0.5 *
Rhus copallina Stem 1.8 30.0 -0.5 *
Rhus copallina Leaf 0.8 19.0 -0.2 *
Ribes uva-crispa Fruit 0.4 6.0 -0.5 *
Ribes rubrum Fruit 0.5 7.0 -0.5 *
Ribes nigrum Fruit 0.6 7.0 -0.5 *
Rosa laevigata Fruit 8.0 9.0 -0.3 *
Rosa canina Fruit 1.8 36.0 1.8 *
Rosmarinus officinalis Plant 5.0 6.0 -0.9 USDA's Ag Handbook 8 and sequelae)
Rosmarinus officinalis Leaf 3.0 19.0 -0.2 USDA's Ag Handbook 8 and sequelae)
Rubia cordifolia Root -- 15.0 0.4 *
Rubus chamaemorus Fruit 0.7 5.6 -0.6 *
Rubus idaeus Fruit 0.7 6.0 -0.5 Revised USDA data received 1993.
*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.