| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Chamissoa altissima | Leaf | 137.0 | 1370.0 | 2.6 | Tramil |
| Chenopodium ambrosioides | Plant | -- | 52.0 | -0.7 | * |
| Chenopodium album | Seed | -- | 5.0 | -0.7 | * |
| Chenopodium album | Leaf | 12.0 | 250.0 | -0.3 | * |
| Chondrus crispus | Plant | -- | 874.0 | 0.3 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| Chrysanthemum coronarium | Leaf | 25.0 | 385.0 | 0.1 | * |
| Chrysanthemum parthenium | Leaf | -- | -- | * | |
| Chrysanthemum coronarium | Bud | 31.0 | 420.0 | * | |
| Chrysanthemum parthenium | Plant | -- | -- | * | |
| Chrysophyllum cainito | Fruit | 4.0 | 47.0 | -0.3 | * |
| Cicer arietinum | Seed | 61.0 | 72.0 | -0.4 | USDA's Ag Handbook 8 and sequelae) |
| Cichorium endivia | Leaf | 6.0 | 360.0 | -0.0 | * |
| Cichorium intybus | Root | 8.0 | 40.0 | -0.4 | * |
| Cichorium intybus | Leaf | 5.0 | 246.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Cimicifuga dahurica | Rhizome | -- | 680.0 | 1.0 | * |
| Cimicifuga racemosa | Root | 8.0 | 38.0 | -0.4 | * |
| Cinnamomum burmannii | Bark | -- | 100.0 | -0.5 | * |
| Cinnamomum aromaticum | Bark | 25.0 | 421.0 | 1.0 | * |
| Cinnamomum verum | Bark | 60.0 | 421.0 | 1.0 | * |
| Cinnamomum sieboldii | Root Bark | -- | 200.0 | -0.4 | * |