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Total Plants: 515
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Plant Low PPM High PPM StdDev *Reference
Ribes uva-crispa Fruit -- 2.0 -0.6 *
Ricinus communis Seed -- 1.0 -1.0 List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979.
Rollinia mucosa Fruit 0.4 1.8 -0.7 Morton, J.F., Major Medicinal Plants. 1977. Atlas of Medicinal Plants of Middle America. Bahamas to Yucatan. 1981.
Rosa canina Fruit 1.4 7.2 0.5 *
Rosa spp Fruit -- -- *
Rosmarinus officinalis Plant 1.5 5.0 -0.4 USDA's Ag Handbook 8 and sequelae)
Rubus idaeus Leaf -- -- *
Rubus idaeus Fruit 0.9 6.7 0.4 Revised USDA data received 1993.
Rumex crispus Leaf 0.8 10.8 -0.1 ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes.
Rumex acetosa Leaf 2.2 22.0 -0.1 *
Rumex crispus Root 3.0 10.8 1.5 *
Ruscus aculeatus Root 0.4 1.4 -0.6 *
Salix alba Bark 0.3 1.7 -0.5 *
Salvia officinalis Leaf 0.6 3.6 -0.2 *
Sambucus canadensis Fruit 1.0 3.0 -0.4 USDA's Ag Handbook 8 and sequelae)
Sambucus nigra Plant 0.6 0.7 -0.7 *
Schisandra chinensis Fruit 0.1 0.5 -1.0 *
Sclerocarya caffra Fruit 0.5 6.0 0.2 *
Sclerocarya caffra Seed -- 1.2 -0.9 *
Scutellaria lateriflora Plant 0.3 2.2 -0.6 *
*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.