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| Title | Chemical Count | Activity Count |
|---|---|---|
| Quercus velutina | 11 | 23 |
| Quillaja saponaria | 2 | 8 |
| Quisqualis indica | 18 | 24 |
| Rabdosia adenantha | 1 | 4 |
| Ranunculus bulbosus | 2 | 2 |
| Raphanus sativus | 38 | 30 |
| Rauvolfia serpentina | 8 | 11 |
| Rauvolfia tetraphylla | 3 | 3 |
| Rauvolfia vomitoria | 2 | 6 |
| Ravensara aromatica | 12 | 16 |
| Rehmannia glutinosa | 18 | 18 |
| Rhamnus cathartica | 4 | 12 |
| Rheedia gardneriana | 1 | 4 |
| Rheum officinale | 20 | 29 |
| Rheum palmatum | 33 | 27 |
| Rheum rhabarbarum | 41 | 28 |
| Rhizophora mangle | 14 | 18 |
| Rhizophora mucronata | 1 | 4 |
| Rhododendron anthopogon | 1 | 4 |
| Rhododendron arboreum | 1 | 6 |