| Rostraria cristata |
Mediterranean Hair-Grass; Hairgrass |
| Rotheca myricoides |
Butterfly Bush; Rough-Leaved Cat's Whiskers |
| Roystonea oleracea |
Cabbage Palm; Caribbean Royal Palm; West Indian Royal Palm |
| Roystonea regia |
Royal Palm |
| Rubicundiella perturbatrix |
|
| Rubus ellipticus |
Yellow Raspberry; Yellow Himalayan Raspberry |
| Rubus fruticosus |
Blackberry |
| Rubus idaeus |
Red Raspberry; Garden Raspberry; European Raspberrry |
| Rubus trivialis |
Southern Dewberry |
| Rudbeckia hirta pulcherrima |
Black-Eyed Susan; Coneflower |
| Rudbeckia laciniata |
Cutleaf Coneflower; Green-Headed Coneflower; Cutleaf Coneflower |
| Ruditapes decussatus |
Chequered Carpet Shell; |
| Ruellia affinis |
Red Ruellia; Wild Petunia |
| Ruellia longepetiolata |
Mexican Petunia; Desert Petunia |
| Ruellia makoyana |
Monkey Plant |
| Ruellia simplex |
Mexican Petunia |
| Rumex crispus |
Curly Dock; Curled Dock |
| Rumex obtusifolius |
Bitter Dock; Broad-Leaved Dock |
| Rumex pulcher |
Fiddle Dock |
| Rumina decollata |
Decollate Snail; |
| Ruprechtia apetala |
Hazel-Leaved Ruprechtia |
| Russelia equisetiformis |
Firecracker Plant, Fire Cracker Heath |
| Ruta graveolens |
Common Rue; Garden Rue |
| Ruttya fruticosa |
Yellow Ruttya; Jammy Mouth |
| Sabal causiarum |
Puerto Rican Hat Palm |
| Sabal maritima |
Cuban Palmetto |
| Sabal mexicana |
Rio Grande Palmetto; Texas Palmetto |
| Sabal minor |
Dwarf Palmetto |
| Sabal palmetto |
Palmetto Palm |
| Sabal yapa |
Thatch Palm |
