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| Chemical Name Sort descending | Dosage | Reference |
|---|---|---|
| FIBER | not available | Duke, 1992 * |
| OLEANOLIC-ACID | not available | Duke, 1992 * |
| POTASSIUM | not available | Duke, 1992 * |
| PUERARIN | not available | Duke, 1992 * |
| URSOLIC-ACID | not available | Duke, 1992 * |
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| Plant Name Sort descending | Common Name | Chemical Count | Total Parts Per Million |
|---|---|---|---|
| Quercus velutina | Black Oak | 1 | 8, 060 |
| Quisqualis indica | Rangoon Creeper | 2 | 19, 900 |
| Raphanus sativus | Radish | 2 | 580, 573 |
| Rauvolfia serpentina | Indian Snakeroot; Serpentine Wood | 1 | 1, 510, 000 |
| Rehmannia glutinosa | Chinese Foxglove | 1 | 9, 730 |
| Rheum palmatum | Chinese Rhubarb | 1 | 21, 600 |
| Rheum rhabarbarum | Rhubarb | 2 | 326, 400 |
| Rhizophora mangle | Red Mangrove | 2 | 151, 500 |
| Rhododendron dauricum | Chinese Alpenrose | 1 | 0 |
| Rhododendron ferrugineum | Rusty-Leaved Alpenrose | 1 | 0 |
| Rhododendron ponticum | Pontic Alpenrose | 1 | 0 |
| Rhodymenia palmata | Dulse | 1 | 22, 700 |
| Rhus copallina | Dwarf Sumac; Winged Sumac | 1 | 101, 000 |
| Rhus glabra | Smooth Sumac | 1 | 14, 740 |
| Rhynchosia minima | Burn Mouth Vine | 1 | 236, 600 |
| Ribes nigrum | Black Currant | 2 | 154, 110 |
| Ribes rubrum | Red Currant; White Currant | 2 | 466, 140 |
| Ribes uva-crispa | Gooseberry | 2 | 177, 466 |
| Ricinus communis | Castorbean | 1 | 103, 000 |
| Robinia pseudoacacia | Black Locust | 1 | 526, 000 |