Unsupported cultivar names
In the following list, cultivar names have been recorded without attribution or description and additional information is unavailable at the time of going to print.
History or knowledge of these cultivars should be sent to the Registrar for inclusion in the Addendum.
- R
- ‘Rosa Superba’
- ‘Rosabel’
- ‘Rosalia’
- ‘Rose Bradwardine’
- ‘Rose DAmour’
- ‘Rose Grand Slam’
- ‘Rose King’
- ‘Rose Peppermint’
- ‘Rose Pink’
- ‘Rose Pixiette’
- ‘Rose Troxell’
- ‘Rose Ville de Paris’
- ‘Rose Wolk’
- ‘Rosea Compacta’
- ‘Rosea Maxima’
- ‘Roseika’
- ‘Roseland Beauty’
- ‘Roselane’
- ‘Rosemary Jephcott’
- ‘Rosemine’
- ‘Roseruga’
- ‘Rosetta Superba’
- ‘Roseum Elegans’
- ‘Roseum Erecta’
- ‘Roseum Spledidissimum’
- ‘Rosy Thorn’
- ‘Rot Glut’
- ‘Rote Karl Dietzmann’
- ‘Roter Triumpf’
- ‘Roughs’
- ‘Rouppe’
- ‘Roxbury Scarlet’
- ‘Royal Blood’
- ‘Royal Convention’
- ‘Royal Princess’
- ‘Royal Scarlet’
- ‘Royal Star’
- ‘Rubri Cinctum’
- ‘Ruby Dawn’
- ‘Ruth Giles’
- ‘Ruward’
- ‘Ryecroft Scarlet’
- ‘Ryecrofts Jewel’ S
- ‘S.P. Wakelee’
- ‘S.S. Walderine’
- ‘Sabella’
- ‘Safrano’
- ‘Saint Paula’
- ‘Salmon Cascade’
- ‘Salmon Compactum’