| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Rumex hymenosepalus | Plant | 180000.0 | 350000.0 | 3.9 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Rhizophora mangle | Bark | 10000.0 | 520000.0 | 3.3 | * |
| Ceratonia siliqua | Bark | 12000.0 | 500000.0 | 3.1 | * |
| Arbutus unedo | Bark | -- | 450000.0 | 2.7 | * |
| Anogeissus latifolia | Leaf | 322000.0 | 329000.0 | 2.7 | * |
| Terminalia chebula | Fruit | 1090.0 | 355000.0 | 2.5 | * |
| Acacia nilotica | Fruit | -- | 349500.0 | 2.5 | * |
| Eucalyptus cornea | Plant | -- | 250000.0 | 2.4 | * |
| Areca catechu | Seed | 150000.0 | 250000.0 | 2.1 | * |
| Rhus coriaria | Leaf | 210000.0 | 280000.0 | 2.1 | Hansel, R., Keller, K., Rimpler, H., and Schneider, G. eds. 1992. Hager's Handbuch der Pharmazeutischen Praxis, Drogen (A-D), 1209 pp., 1993 (E-O), 970 pp., 1994 (P-Z), 1196 pp. Springer-Verlag, Berlin. |
| Rumex acetosella | Root | 80000.0 | 140000.0 | 2.0 | * |
| Camellia sinensis | Leaf | 33800.0 | 270000.0 | 1.9 | * |
| Rhus glabra | Leaf | -- | 270000.0 | 1.9 | * |
| Phyllanthus emblica | Fruit | -- | 280000.0 | 1.8 | * |
| Arctostaphylos uva-ursi | Plant | 60000.0 | 200000.0 | 1.7 | * |
| Agrimonia eupatoria | Shoot | 30000.0 | 210000.0 | 1.7 | * |
| Fallopia japonica | Leaf | 170000.0 | 240000.0 | 1.6 | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. |
| Eucalyptus citriodora | Resin, Exudate, Sap | -- | 482000.0 | 1.4 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Psidium guajava | Bark | 110000.0 | 300000.0 | 1.4 | * |
| Punica granatum | Stem Bark | 100000.0 | 250000.0 | 1.4 | * |