| 0 | 53116 | 12E0100001 | 'Alena' | Rhododendron decorum Franch. | Czechoslovakia | | 4 | 12E0100001 ** |
| 1 | 53130 | 12E0100015 | 'Marie Oliva Schlickova' | Rhododendron decorum Franch. | Czechoslovakia | | 4 | 12E0100015 ** |
| 2 | 53131 | 12E0100016 | 'Motyl' | Rhododendron decorum Franch. | Czechoslovakia | | 4 | 12E0100016 ** |
| 3 | 53132 | 12E0100017 | 'Panenka' | Rhododendron decorum Franch. | Czechoslovakia | | 4 | 12E0100017 ** |
| 4 | 53135 | 12E0100020 | 'Rose Marie' | Rhododendron decorum Franch. | Czechoslovakia | | 4 | 12E0100020 ** |
| 5 | 53139 | 12E0100024 | 'Arnost Silva Tarouca' | Rhododendron decorum Franch. | Czechoslovakia | | 4 | 12E0100024 ** |
| 6 | 53141 | 12E0100026 | 'Album Grandiflorum' | Rhododendron catawbiense Michx. | United Kingdom | | 4 | 12E0100026 ** |
| 7 | 53161 | 12E0100046 | 'Furnivall's Daughter' | Rhododendron hybr. | United Kingdom | | 4 | 12E0100046 ** |
| 8 | 53168 | 12E0100053 | 'Herme' | Rhododendron hybr. | Germany | | 4 | 12E0100053 ** |
| 9 | 53170 | 12E0100055 | 'Holger' | Rhododendron hybr. | Germany | | 4 | 12E0100055 ** |
| 10 | 53181 | 12E0100066 | 'Leopold' | Rhododendron catawbiense Michx. | Germany | | 4 | 12E0100066 ** |
| 11 | 53238 | 12E0100123 | 'Doktor h. c. Alexander Steffen' | Rhododendron hybr. | unknown | | 4 | 12E0100123 ** |
| 12 | 53256 | 12E0100141 | 'Florence Sarah Smith' | Rhododendron hybr. | unknown | | 4 | 12E0100141 ** |
| 13 | 53317 | 12E0100202 | 'Lissabon' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 4 | 12E0100202 ** |
| 14 | 53326 | 12E0100211 | 'Oudijk's Sensation' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 4 | 12E0100211 ** |
| 15 | 53331 | 12E0100216 | 'Cannon's Double' | Rhododendron hybr. | United States | | 4 | 12E0100216 ** |
| 16 | 53341 | 12E0100226 | 'Royal Pink' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 4 | 12E0100226 ** |
| 17 | 53346 | 12E0100231 | 'Simona' | Rhododendron hybr. | Germany | | 4 | 12E0100231 ** |
| 18 | 53353 | 12E0100238 | 'August Lamken' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 4 | 12E0100238 ** |
| 19 | 53359 | 12E0100244 | 'Hachmann's Evelyn' | Rhododendron hybr. | Germany | | 4 | 12E0100244 ** |
| 20 | 53363 | 12E0100248 | 'Bad Eilsen' | Rhododendron forrestii Balf. f. ex Diels subsp. forrestii | Germany | | 4 | 12E0100248 ** |
| 21 | 53375 | 12E0100260 | 'Maharani' | Rhododendron hybr. | Germany | | 4 | 12E0100260 ** |
| 22 | 53392 | 12E0100277 | 'Stadt Essen' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 4 | 12E0100277 ** |
| 23 | 53425 | 12E0100310 | 'Goerlitz' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 4 | 12E0100310 ** |
| 24 | 53427 | 12E0100312 | 'Vater Boehlje' | Rhododendron hybr. | Germany | | 4 | 12E0100312 ** |
| 25 | 53430 | 12E0100315 | 'Ben Moseley' | Rhododendron fortunei Lindl. subsp. fortunei | United States | | 4 | 12E0100315 ** |
| 26 | 53460 | 12E0100345 | 'Hachmann's Felicitas' | Rhododendron hybr. | Germany | | 4 | 12E0100345 ** |
| 27 | 53476 | 12E0100361 | 'Sonare' | Rhododendron hybr. | Germany | | 4 | 12E0100361 ** |
| 28 | 53481 | 12E0100366 | 'Eggert Rohwer' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 4 | 12E0100366 ** |
| 29 | 53602 | 12E0100487 | 'Hachmann's Harlekin' | Rhododendron hybr. | Germany | | 4 | 12E0100487 ** |
| 30 | 53625 | 12E0100510 | 'Corneille' | Rhododendron hybr. | unknown | | 4 | 12E0100510 ** |
| 31 | 53669 | 12E0100555 | 'Henry's Red' | Rhododendron hybr. | Germany | | 4 | 12E0100555 ** |
| 32 | 53721 | 12E0100825 | 'Gartendirektor Rieger' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 4 | 12E0100825 ** |
| 33 | 53747 | 12E0100851 | 'Vizovice' | Rhododendron kiusianum Makino | Czech Republic | | 4 | 12E0100851 ** |
| 34 | 53765 | 12E0100869 | 'Ignatius Sargent' | Rhododendron catawbiense Michx. | United Kingdom | | 4 | 12E0100869 ** |
| 35 | 53768 | 12E0100872 | 'Osmar' | Rhododendron williamsianum Rehder & E. H. Wilson | United Kingdom | | 4 | 12E0100872 ** |
| 36 | 65857 | 12E0100890 | 'Kriemhild' | Rhododendron wardii W. W. Sm. | Germany | | 4 | 12E0100890 ** |