| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Cinchona spp | Bark | -- | -- | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. | |
| Cinchona pubescens | Bark | -- | 28767.0 | * | |
| Cinchona pubescens | Leaf | -- | -- | * | |
| Cinchona pubescens | Root | -- | 2700.0 | * | |
| Cinchona pubescens | Stem | -- | -- | * | |
| Cinchona pubescens | Shoot | -- | 1000.0 | * |