| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Carthamus tinctorius | Flower | 0.5 | 0.24 | * | |
| Pinus walliciana | Resin, Exudate, Sap | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Petroselinum crispum | Leaf | -- | -- | * | |
| Capsicum frutescens | Fruit | -- | -- | * | |
| Capsicum annuum | Fruit | -- | -- | * |