| 0 | 53149 | 12E0100034 | 'Boule de Neige' | Rhododendron hybr. | France | | 0 | 12E0100034 ** |
| 1 | 53158 | 12E0100043 | 'Everestianum' | Rhododendron catawbiense Michx. | United Kingdom | | 0 | 12E0100043 ** |
| 2 | 53168 | 12E0100053 | 'Herme' | Rhododendron hybr. | Germany | | 0 | 12E0100053 ** |
| 3 | 53182 | 12E0100067 | 'Madame Masson' | Rhododendron hybr. | France | | 0 | 12E0100067 ** |
| 4 | 53194 | 12E0100079 | 'Quapp' | Rhododendron hybr. | Germany | | 0 | 12E0100079 ** |
| 5 | 53198 | 12E0100083 | 'Admiral Piet Hein' | Rhododendron hybr. | Netherlands | | 0 | 12E0100083 ** |
| 6 | 53199 | 12E0100084 | 'Verbesserte Adriaan Koster' | Rhododendron hybr. | Netherlands | | 0 | 12E0100084 ** |
| 7 | 53206 | 12E0100091 | 'Amphion' | Rhododendron catawbiense Michx. | United Kingdom | | 0 | 12E0100091 ** |
| 8 | 53209 | 12E0100094 | 'Anton' | Rhododendron catawbiense Michx. | Germany | | 0 | 12E0100094 ** |
| 9 | 53218 | 12E0100103 | 'Madame Jules Porges' | Rhododendron hybr. | France | | 0 | 12E0100103 ** |
| 10 | 53229 | 12E0100114 | 'Darius' | Rhododendron smirnowii Trautv. | Germany | | 0 | 12E0100114 ** |
| 11 | 53231 | 12E0100116 | 'Delta' | Rhododendron hybr. | Germany | | 0 | 12E0100116 ** |
| 12 | 53256 | 12E0100141 | 'Florence Sarah Smith' | Rhododendron hybr. | unknown | | 0 | 12E0100141 ** |
| 13 | 53310 | 12E0100195 | 'Hero' | Rhododendron catawbiense Michx. | Germany | | 0 | 12E0100195 ** |
| 14 | 53316 | 12E0100201 | 'Leopardii' | Rhododendron arboreum Sm. | United Kingdom | | 0 | 12E0100201 ** |
| 15 | 53319 | 12E0100204 | 'Madame Carvalho' | Rhododendron catawbiense Michx. | United Kingdom | | 0 | 12E0100204 ** |
| 16 | 53322 | 12E0100207 | 'Mrs P. den Ouden' | Rhododendron hybr. | Netherlands | | 0 | 12E0100207 ** |
| 17 | 53330 | 12E0100215 | 'Hachmann's Porzellan' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 0 | 12E0100215 ** |
| 18 | 53369 | 12E0100254 | 'Hachmann's Junifeuer' | Rhododendron hybr. | Germany | | 0 | 12E0100254 ** |
| 19 | 53404 | 12E0100289 | 'Papilionaceum' | Rhododendron hybr. | United Kingdom | | 0 | 12E0100289 ** |
| 20 | 53488 | 12E0100373 | 'Kate Waterer' | Rhododendron catawbiense Michx. | United Kingdom | | 0 | 12E0100373 ** |
| 21 | 53490 | 12E0100375 | 'Otto Hahn' | Rhododendron hybr. | Germany | | 0 | 12E0100375 ** |
| 22 | 53492 | 12E0100377 | 'Sarina' | Rhododendron hybr. | Germany | | 0 | 12E0100377 ** |
| 23 | 53502 | 12E0100387 | 'Berlin' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 0 | 12E0100387 ** |
| 24 | 53518 | 12E0100403 | 'Saturnus' | Rhododendron hybr. | Netherlands | | 0 | 12E0100403 ** |
| 25 | 53552 | 12E0100437 | 'Mrs John Penn' | Rhododendron hybr. | United Kingdom | | 0 | 12E0100437 ** |
| 26 | 53559 | 12E0100444 | 'Pride of Cambridge' | Rhododendron hybr. | unknown | | 0 | 12E0100444 ** |
| 27 | 53602 | 12E0100487 | 'Hachmann's Harlekin' | Rhododendron hybr. | Germany | | 0 | 12E0100487 ** |
| 28 | 53605 | 12E0100490 | 'Klondyke' | Rhododendron hybr. | United Kingdom | | 0 | 12E0100490 ** |
| 29 | 53649 | 12E0100535 | 'Ginger' | Rhododendron hybr. | unknown | | 0 | 12E0100535 ** |
| 30 | 53699 | 12E0100803 | 'Reve d'Amour' | Rhododendron viscosum (L.) Torr. | Netherlands | | 0 | 12E0100803 ** |
| 31 | 53724 | 12E0100828 | 'Schneeglanz' | Rhododendron obtusum (Lindl.) Planch. | Germany | | 0 | 12E0100828 ** |
| 32 | 53744 | 12E0100848 | 'Bakkarat' | Rhododendron hybr. | Germany | | 0 | 12E0100848 ** |
| 33 | 53764 | 12E0100868 | 'Golden Eagle' | Rhododendron hybr. | United Kingdom | | 0 | 12E0100868 ** |
| 34 | 65823 | 12E0100883 | 'Rusalka' | Rhododendron decorum Franch. | Czechoslovakia | | 0 | 12E0100883 ** |
| 35 | 65824 | 12E0100884 | 'Loreta' | Rhododendron wardii W. W. Sm. | Czech Republic | | 0 | 12E0100884 ** |
| 36 | 65846 | 12E0100888 | 'Snezka' | Rhododendron obtusum (Lindl.) Planch. | Czech Republic | | 0 | 12E0100888 ** |
| 37 | 67927 | 12E0100896 | 'Milesovka' | Rhododendron obtusum (Lindl.) Planch. | Czech Republic | | 0 | 12E0100896 ** |