Click on a common name for a photo of the plant, or click on a letter for names beginning with that letter.
| Rabbit-tobacco |
Pseudognaphalium obtusifolium |
| Radish, Wild |
Raphanus raphanistrum |
| Ragweed |
Ambrosia artemisiifolia |
| Ragweed, Giant |
Ambrosia trifida |
| Ragwort, Golden |
Packera aurea |
| Rain-tree, Golden |
Koelreuteria paniculata |
| Ramp |
Allium tricoccum |
| Ramp |
Allium tricoccum |
| Rape, Bird's |
Brassica rapa |
| Raspberry, Australian |
Rubus parvifolius |
| Raspberry, Black |
Rubus occidentalis |
| Raspberry, Japanese |
Rubus parvifolius |
| Raspberry, Purple-flowering |
Rubus odoratus |
| Rattlesnake-master |
Eryngium aquaticum var. aquaticum |
| Rattlesnake-plantain, Downy |
Goodyera pubescens |
| Rattlesnake-root, Lion's-foot |
Nabalus serpentarius |
| Rattlesnake-root, Tall |
Nabalus altissimus |
| Red-cedar, Eastern |
Juniperus virginiana |
| Redbud, Eastern |
Cercis canadensis var. canadensis |
| Reed, European |
Phragmites australis subsp. australis |
| Rhododendron, Great |
Rhododendron maximum |
| Rockcress, Lyre-leaf |
Arabidopsis lyrata subsp. lyrata |
| Rockcress, Smooth |
Boechera laevigata var. laevigata |
| Rocket, Dame's |
Hesperis matronalis |
| Rocket, Yellow |
Barbarea vulgaris |
| Rose, Carolina |
Rosa carolina subsp. carolina |
| Rose, Multiflora |
Rosa multiflora |
| Rose, Rugosa |
Rosa rugosa |
| Rose, Swamp |
Rosa palustris |
| Rose-mallow |
Hibiscus moscheutos |
| Rose-of-sharon |
Hibiscus syriacus |
| Rye, River Wild |
Elymus riparius |