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.
- O
- ‘Oppolion’
- ‘Optimum’
- ‘Orange Boven’
- ‘Orange Crampel’
- ‘Orange et Jaune’
- ‘Orange Globe’
- ‘Orange Masterpiece’
- ‘Orange Queen Ivy Leaf.’
- ‘Orange Salmon Sport’
- ‘Orange Splash’
- ‘Orchid Glory’
- ‘Oreon’
- ‘Oriole’
- ‘Orthello’
- ‘Oscar Stanley’
- ‘Our Splendour’
- ‘Oxford’ P
- ‘Pacifico’
- ‘Painted Pet’
- ‘Painter’
- ‘Palagial’
- ‘Palatine’
- ‘Pale Lenore’
- ‘Panache de Tourly’
- ‘Pansa’
- ‘Paragon’
- ‘Parepa’
- ‘Parepal’
- ‘Parodii’
- ‘Partenhope’
- ‘Partenhopee’
- ‘Pat Nathan’
- ‘Pat White’
- ‘Patches’
- ‘Patterson’s Sunset’
- ‘Paul Alene’
- ‘Paul Appel’
- ‘Pauline Demay’
- ‘Pauline Gaspard’
- ‘Peach Nosegay’
- ‘Peach Sppd.’
- ‘Pelfi Lachs CascadeIvy Leaf.’
- ‘Pelfi Montivideo’
- ‘Pelfi Rosa Mini CascadeIvy Leaf.c1976.’
- ‘Pelleport’
- ‘Pelopidas’
- ‘Pensee D’Jena’
- ‘Pentagruel’
- ‘Peppermint’
- ‘Peppermint Candy’