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| Chemical Name | Dosage | Reference |
|---|---|---|
| PROTOPINE | not available | Duke, 1992 * |
| PTAEROGLYCOL | not available | Duke, 1992 * |
| PTELEATINIUM | not available | Duke, 1992 * |
| PTEROSTILBENE | not available | Duke, 1992 * |
| PTERYGOSPERMIN | not available | Duke, 1992 * |
| PUCHIIN | not available | Oriental Materia Medica (three volumes by Dr. Hsu and collaborators) |
| PULEGONE | not available | Economou, D., and Nahrstedt, A. 1991. Chemical, Physiological, and Toxicological Aspects of the Essential Oil of Some Species of the Genus Bystropogon*. Planta Medica, 57: 347, 1991. |
| PULVEROCHROMENOL | not available | Duke, 1992 * |
| PURPURIN-1-METHYL-ETHER | not available | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. |
| PYROGALLOL | not available | Duke, 1992 * |
| QUERCETAGETIN | not available | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. |
| QUERCETIN | not available | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. |
| QUERCETIN-3'-GLUCOSIDE | not available | Duke, 1992 * |
| QUERCETIN-3-O-GALACTOSYL-1,6-GLUCOSIDE | not available | Duke, 1992 * |
| QUERCETIN-7-O-GLUCOSIDE | not available | Duke, 1992 * |
| QUERCITRIN | not available | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. |
| QUININE | not available | Duke, 1992 * |
| RAPHANIN | not available | Duke, 1992 * |
| RESORCINOL | not available | Duke, 1992 * |
| RESVERATROL | not available | Duke, 1992 * |
| Plant Name | Common Name | Chemical Count | Total Parts Per Million |
|---|---|---|---|
| Rhododendron falconeri | not available | 1 | 0 |
| Rhododendron ferrugineum | Rusty-Leaved Alpenrose | 4 | 0 |
| Rhododendron grande | not available | 1 | 0 |
| Rhododendron ponticum | Pontic Alpenrose | 10 | 120, 000 |
| Rhodomyrtus tomentosa | not available | 1 | 6 |
| Rhodymenia palmata | Dulse | 2 | 153 |
| Rhus coriaria | Sicilian Sumac; Sumac; Tanner's Sumac | 9 | 840, 000 |
| Rhus glabra | Smooth Sumac | 2 | 270, 006 |
| Rhus toxicodendron | Poison Ivy | 3 | 0 |
| Rhynchosia minima | Burn Mouth Vine | 2 | 0 |
| Ribes nigrum | Black Currant | 37 | 164, 114 |
| Ribes rubrum | Red Currant; White Currant | 8 | 68, 528 |
| Ribes uva-crispa | Gooseberry | 10 | 19, 379 |
| Ricinus communis | Castorbean | 13 | 2, 380 |
| Robinia pseudoacacia | Black Locust | 12 | 326, 000 |
| Rollinia mucosa | Biriba; Lancewood | 1 | 2, 900 |
| Rosa canina | Rose; Dogbrier; Dog Rose | 21 | 774, 105 |
| Rosa centifolia | Cabbage Rose | 11 | 1, 200 |
| Rosa damascena | Damask Rose | 20 | 15, 000 |
| Rosa davurica | not available | 1 | 70 |