| 0 | 53119 | 12E0100004 | 'Bohumil Kavka' | Rhododendron hybr. | Czechoslovakia | | 3 | 12E0100004 ** |
| 1 | 53122 | 12E0100007 | 'Eva' | Rhododendron hybr. | Czechoslovakia | | 3 | 12E0100007 ** |
| 2 | 53129 | 12E0100014 | 'Moravanka' | Rhododendron dichroanthum Diels subsp. scyphocalyx (Balf. f. & Forrest) Cowan | Czechoslovakia | | 3 | 12E0100014 ** |
| 3 | 53132 | 12E0100017 | 'Panenka' | Rhododendron decorum Franch. | Czechoslovakia | | 3 | 12E0100017 ** |
| 4 | 53133 | 12E0100018 | 'Petr' | Rhododendron hybr. | Czechoslovakia | | 3 | 12E0100018 ** |
| 5 | 53139 | 12E0100024 | 'Arnost Silva Tarouca' | Rhododendron decorum Franch. | Czechoslovakia | | 3 | 12E0100024 ** |
| 6 | 53144 | 12E0100029 | 'Arthur Bedford' | Rhododendron ponticum L. | United Kingdom | | 3 | 12E0100029 ** |
| 7 | 53147 | 12E0100032 | 'Blue Danube' | Rhododendron fortunei Lindl. subsp. discolor (Franch.) D. F. Chamb. | United Kingdom | | 3 | 12E0100032 ** |
| 8 | 53148 | 12E0100033 | Blue Peter | Rhododendron hybr. | United Kingdom | | 3 | 12E0100033 ** |
| 9 | 53157 | 12E0100042 | 'Edward S. Rand' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100042 ** |
| 10 | 53161 | 12E0100046 | 'Furnivall's Daughter' | Rhododendron hybr. | United Kingdom | | 3 | 12E0100046 ** |
| 11 | 53191 | 12E0100076 | 'Picturatum' | Rhododendron maximum L. | United Kingdom | | 3 | 12E0100076 ** |
| 12 | 53206 | 12E0100091 | 'Amphion' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100091 ** |
| 13 | 53207 | 12E0100092 | 'Mrs Furnivall' | Rhododendron hybr. | United Kingdom | | 3 | 12E0100092 ** |
| 14 | 53212 | 12E0100097 | 'Arno' | Rhododendron catawbiense Michx. | Germany | | 3 | 12E0100097 ** |
| 15 | 53218 | 12E0100103 | 'Madame Jules Porges' | Rhododendron hybr. | France | | 3 | 12E0100103 ** |
| 16 | 53269 | 12E0100154 | 'H. Halven' | Rhododendron hybr. | unknown | | 3 | 12E0100154 ** |
| 17 | 53275 | 12E0100160 | 'Hermann Nitzschner' | Rhododendron hybr. | Germany | | 3 | 12E0100160 ** |
| 18 | 53295 | 12E0100180 | 'Marie Fortie' | Rhododendron hybr. | Belgium | | 3 | 12E0100180 ** |
| 19 | 53319 | 12E0100204 | 'Madame Carvalho' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100204 ** |
| 20 | 53324 | 12E0100209 | 'Von Oheimb - Woislowitz' | Rhododendron catawbiense Michx. | Germany | | 3 | 12E0100209 ** |
| 21 | 53329 | 12E0100214 | 'Polar Star' | Rhododendron smirnowii Trautv. | Netherlands | | 3 | 12E0100214 ** |
| 22 | 53369 | 12E0100254 | 'Hachmann's Junifeuer' | Rhododendron hybr. | Germany | | 3 | 12E0100254 ** |
| 23 | 53404 | 12E0100289 | 'Papilionaceum' | Rhododendron hybr. | United Kingdom | | 3 | 12E0100289 ** |
| 24 | 53456 | 12E0100341 | 'Berliner Liebe' | Rhododendron insigne Hemsl. & E. H. Wilson | Germany | | 3 | 12E0100341 ** |
| 25 | 53503 | 12E0100388 | 'Bertha' | Rhododendron catawbiense Michx. | Germany | | 3 | 12E0100388 ** |
| 26 | 53526 | 12E0100411 | 'Gina Lollobrigida' | Rhododendron hybr. | Netherlands | | 3 | 12E0100411 ** |
| 27 | 53527 | 12E0100412 | 'Hachmann's Charmant' | Rhododendron hybr. | Germany | | 3 | 12E0100412 ** |
| 28 | 53529 | 12E0100414 | 'Herkules' | Rhododendron campanulatum D. Don | Germany | | 3 | 12E0100414 ** |
| 29 | 53559 | 12E0100444 | 'Pride of Cambridge' | Rhododendron hybr. | unknown | | 3 | 12E0100444 ** |
| 30 | 53581 | 12E0100466 | 'Kalamaika' | Rhododendron hybr. | Germany | | 3 | 12E0100466 ** |
| 31 | 53631 | 12E0100516 | 'Doria' | Rhododendron brachycarpum D. Don ex G. Don | Germany | | 3 | 12E0100516 ** |
| 32 | 53647 | 12E0100533 | 'George Cunningham' | Rhododendron hybr. | unknown | | 3 | 12E0100533 ** |
| 33 | 53668 | 12E0100554 | 'Baroness Henry Schroeder' | Rhododendron hybr. | Germany | | 3 | 12E0100554 ** |
| 34 | 53681 | 12E0100567 | 'Signalgluehen' | Rhododendron hybr. | Germany | | 3 | 12E0100567 ** |
| 35 | 53758 | 12E0100862 | 'Becov' | Rhododendron hybr. | Czech Republic | | 3 | 12E0100862 ** |