| Ribes nigrum |
black currant |
| Rosmarinus officinalis |
rosemary |
| Ruta graveolens |
rue |
| Rhodiola rosea |
rhodiola, rosenroot |
| Ruscus aculeatus |
butcher's broom, box holly |
| Rehmannia glutinosa |
rehmannia, di huang |
| Rauwolfia serpentina |
rauwolfia, arpagandha, Indian snakeroot |
| Rubus idaeus |
raspberry leaf |
| Rumex acetosa |
sorrel |
| Rosa canina |
dog rose |
| Rumex crispus. R. obtusifolius |
yellow dock, broad-leaf dock |
