| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Petiveria alliacea | Plant | -- | -- | Germosen-Robineau, L. (Ed.) 1997. Farmacopea Vegetal Caribena. Endacaribe, Tramil. Ediciones Emile Desormeaux, Martinique F.W.I. 360 pp. | |
| Hyoscyamus niger | Leaf | -- | -- | * | |
| Salvia officinalis | Plant | -- | -- | * | |
| Datura stramonium | Plant | -- | -- | * | |
| Glechoma hederacea | Plant | -- | -- | Oriental Materia Medica (three volumes by Dr. Hsu and collaborators) | |
| Polygonum hydropiper | Plant | -- | -- | * | |
| Sambucus simpsonii | Flower | -- | -- | Grenand, P., Moretti, C., and Jacquemin, H. 1987. Pharmacopees Traditionnelles en Guyane. l'ORSTROM, Paris. 569 pp. | |
| Piper betel | Leaf | 2600.0 | 4200.0 | * |