| Rhododendron schlippenbachii Koreansk azalea |
| Rhododendron vernicosum Lackrododendron |
| Rhoicissus digitata Fingercissus, pärlvin |
| Rhopalostylis sapida Nikaupalm |
| Ribes sanguineum Rosenrips |
| Ribes sanguineum 'King Edward VII' Rosenrips |
| Ricinus communis Ricin |
| Ricinus communis 'Carmencita Red' Ricin |
| Robinia ambigua Rödblommig robinia |
| Robinia pseudoacacia robinia |
| Rosa 'Agatha' Francofurtana-ros |
| Rosa 'Agathe Incarnata' Gallicaros |
| Rosa 'Aglaia' Multiflora-ros |
| Rosa 'Aïcha' Spinosissimaros |
| Rosa 'Aimable Amie' Gallicaros |
| Rosa 'Aksel Olsen' Helenae-ros |
| Rosa 'Alain Blanchard' Gallica-ros |
| Rosa 'Alba Maxima' Jungfruros |
| Rosa 'Alchymist' Storblommig klätterros |
| Rosa 'Alexander von Humboldt' Modern buskros |
| Rosa 'All The Rage' Modern buskros |
| Rosa 'Aloha' Tehybridros |
| Rosa 'Amalia' Tehybridros |
| Rosa 'Ambiente' Tehybridros |
| Rosa 'Amsterdam' Floribundaros |
| Rosa 'Aperitif' Tehybridros |
| Rosa 'Aqua!' Tehybridros |
| Rosa 'Aspirin' Floribundaros |
| Rosa 'Astrid Lindgren' Floribundaros |
| Rosa 'Augusta Luise' Tehybridros |
| Rosa 'Autumn Damask' Höstdamascenerros |
| Rosa 'Avalanche Candy+' Tehybridros |
| Rosa 'Avalanche+' Tehybridros |
| Rosa 'Baccara' Tehybridros |
| Rosa 'Bad Birnbach' Floribundaros |