| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Cyamopsis tetragonoloba | Shoot | -- | 2800.0 | -0.2 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Cyclanthera pedata | Fruit | 140.0 | 2800.0 | -0.1 | * |
| Cydonia oblonga | Fruit | 100.0 | 960.0 | -0.2 | * |
| Cynara cardunculus | Flower | -- | 828.0 | -0.6 | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses |
| Cyperus rotundus | Root | -- | 90.0 | -0.6 | * |
| Cyphomandra betacea | Fruit | 223.0 | 2060.0 | -0.2 | * |
| Cyrtosperma chamissonis | Root | -- | 762.0 | -0.2 | * |
| Datura metel | Leaf | -- | 2220.0 | -0.2 | * |
| Datura stramonium | Plant | -- | -- | * | |
| Daucus carota | Root | 91.0 | 775.0 | -0.2 | * |
| Dioscorea alata | Root | -- | 100.0 | -0.6 | * |
| Dioscorea villosa | Root | 110.0 | 460.0 | -0.4 | * |
| Dioscorea villosa | Rhizome | -- | 149.0 | -0.6 | * |
| Dioscorea sp. | Root | -- | 194.0 | -0.5 | * |
| Dioscorea pentaphylla | Root | 26.0 | 140.0 | -0.6 | * |
| Diospyros digyna | Fruit | 1915.0 | 9330.0 | 0.3 | Morton, J.F., Major Medicinal Plants. 1977. Atlas of Medicinal Plants of Middle America. Bahamas to Yucatan. 1981. |
| Diospyros virginiana | Fruit | 660.0 | 1855.0 | -0.2 | * |
| Duchesnea indica | Leaf | -- | -- | * | |
| Durio zibethinus | Fruit | 240.0 | 1270.0 | -0.2 | * |
| Echinacea purpurea | Root | 212.0 | 843.0 | -0.2 | * |