| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Vitex agnus-castus | Leaf | -- | -- | * | |
| Vitex agnus-castus | Fruit | -- | -- | * | |
| Vitex agnus-castus | Flower | -- | -- | * | |
| Porophyllum ruderale | Plant | 15.0 | 22.0 | Loayza, I., de Groot, W., Lorenzo, D. et al. 1999. Composition of the essential oil of Porophyllum ruderale (Jacq.) Cass. from Bolivia. Flav. & Fragr. J. 14: 393-8. |