UMass Extension Weed Herbarium
| Common Name | Scientific Name | Family Name | |
|---|---|---|---|
| radish, wild | Raphanus raphanistrum | Brassicaceae (Cruciferae) - Mustard Family | |
| ragged robin | Lychnis flos-cuculi | Caryophyllaceae - Pink Family | |
| ragweed , common | Ambrosia artemisiifolia | Asteraceae (Compositae) - Aster or Sunflower Family | |
| ragweed, giant | Ambrosia trifida | Asteraceae (Compositae) - Aster or Sunflower Family | |
| ragweed, great | see - ragweed, giant | ||
| ragwort | see - groundsel, common | ||
| ragwort, tansy | Senecio jacobaea | Asteraceae (Compositae) - Aster or Sunflower Family | |
| raspberry, purple-flowering | Rubus odoratus | Rosaceae - Rose Family | |
| raspberry , wine | see - wineberry, wine raspberry | ||
| rattleweed, cockscomb | see - yellow-rattle | ||
| redtop, tall | see - purpletop | ||
| reed, common | Phragmites australis | Poaceae (Graminae) - Grass Family | |
| ribgrass | see - plantain, narrowleaf | ||
| ribwort | see - plantain, narrowleaf | ||
| richweed | see - clearweed | ||
| richweed | see - horsebalm | ||
| robin-runaway | see - ivy, ground | ||
| rocket, yellow | Barbarea vulgaris | Brassicaceae (Cruciferae) - Mustard Family | |
| rose, multiflora | Rosa multiflora | Rosaceae - Rose Family | |
| rose acacia | see - locust, bristly | ||
| rosinweed, cup | see - cup plant | ||
| rosinweed, cupleaf | see - cup plant | ||
| rosinweed, squarestem | see - cup plant | ||
| rush, path | Juncus tenuis | Juncaceae - Rush Family |