| 0 | 53117 | 12E0100002 | 'Antonin Dvorak' | Rhododendron smirnowii Trautv. | Czechoslovakia | | 3 | 12E0100002 ** |
| 1 | 53119 | 12E0100004 | 'Bohumil Kavka' | Rhododendron hybr. | Czechoslovakia | | 3 | 12E0100004 ** |
| 2 | 53125 | 12E0100010 | 'Lajka' | Rhododendron smirnowii Trautv. | Czechoslovakia | | 3 | 12E0100010 ** |
| 3 | 53126 | 12E0100011 | 'Lunik' | Rhododendron smirnowii Trautv. | Czechoslovakia | | 3 | 12E0100011 ** |
| 4 | 53128 | 12E0100013 | 'Milan' | Rhododendron hybr. | Czechoslovakia | | 3 | 12E0100013 ** |
| 5 | 53129 | 12E0100014 | 'Moravanka' | Rhododendron dichroanthum Diels subsp. scyphocalyx (Balf. f. & Forrest) Cowan | Czechoslovakia | | 3 | 12E0100014 ** |
| 6 | 53131 | 12E0100016 | 'Motyl' | Rhododendron decorum Franch. | Czechoslovakia | | 3 | 12E0100016 ** |
| 7 | 53135 | 12E0100020 | 'Rose Marie' | Rhododendron decorum Franch. | Czechoslovakia | | 3 | 12E0100020 ** |
| 8 | 53139 | 12E0100024 | 'Arnost Silva Tarouca' | Rhododendron decorum Franch. | Czechoslovakia | | 3 | 12E0100024 ** |
| 9 | 53140 | 12E0100025 | 'Album Elegans' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100025 ** |
| 10 | 53141 | 12E0100026 | 'Album Grandiflorum' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100026 ** |
| 11 | 53147 | 12E0100032 | 'Blue Danube' | Rhododendron fortunei Lindl. subsp. discolor (Franch.) D. F. Chamb. | United Kingdom | | 3 | 12E0100032 ** |
| 12 | 53148 | 12E0100033 | Blue Peter | Rhododendron hybr. | United Kingdom | | 3 | 12E0100033 ** |
| 13 | 53151 | 12E0100036 | 'Catawbiense Album' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100036 ** |
| 14 | 53152 | 12E0100037 | 'Catawbiense Boursault' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100037 ** |
| 15 | 53155 | 12E0100040 | 'Violetta' | Rhododendron decorum Franch. | Czech Republic | | 3 | 12E0100040 ** |
| 16 | 53156 | 12E0100041 | 'Doctor H. C. Dresselhuys' | Rhododendron hybr. | Netherlands | | 3 | 12E0100041 ** |
| 17 | 53166 | 12E0100051 | 'Gomer Waterer' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100051 ** |
| 18 | 53167 | 12E0100052 | 'Gudrun' | Rhododendron hybr. | Germany | | 3 | 12E0100052 ** |
| 19 | 53179 | 12E0100064 | 'Lavender Girl' | Rhododendron fortunei Lindl. subsp. fortunei | United Kingdom | | 3 | 12E0100064 ** |
| 20 | 53180 | 12E0100065 | 'Lee's Dark Purple' | Rhododendron catawbiense Michx. | unknown | | 3 | 12E0100065 ** |
| 21 | 53191 | 12E0100076 | 'Picturatum' | Rhododendron maximum L. | United Kingdom | | 3 | 12E0100076 ** |
| 22 | 53204 | 12E0100089 | 'Allah' | Rhododendron catawbiense Michx. | Germany | | 3 | 12E0100089 ** |
| 23 | 53223 | 12E0100108 | 'Sweet Simplicity' | Rhododendron ponticum L. | United Kingdom | | 3 | 12E0100108 ** |
| 24 | 53231 | 12E0100116 | 'Delta' | Rhododendron hybr. | Germany | | 3 | 12E0100116 ** |
| 25 | 53246 | 12E0100131 | 'Emma' | Rhododendron catawbiense Michx. | Germany | | 3 | 12E0100131 ** |
| 26 | 53275 | 12E0100160 | 'Hermann Nitzschner' | Rhododendron hybr. | Germany | | 3 | 12E0100160 ** |
| 27 | 53284 | 12E0100169 | 'Ponticum Roseum' | Rhododendron hybr. | United States | | 3 | 12E0100169 ** |
| 28 | 53289 | 12E0100174 | 'Midsummer' | Rhododendron maximum L. | United Kingdom | | 3 | 12E0100174 ** |
| 29 | 53338 | 12E0100223 | 'Roseum Elegans' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100223 ** |
| 30 | 53339 | 12E0100224 | 'Roseum Superbum' | Rhododendron catawbiense Michx. | United Kingdom | | 3 | 12E0100224 ** |
| 31 | 53363 | 12E0100248 | 'Bad Eilsen' | Rhododendron forrestii Balf. f. ex Diels subsp. forrestii | Germany | | 3 | 12E0100248 ** |
| 32 | 53448 | 12E0100333 | 'Tibet' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 3 | 12E0100333 ** |
| 33 | 53474 | 12E0100359 | 'Ricarda' | Rhododendron hybr. | Germany | | 3 | 12E0100359 ** |
| 34 | 53478 | 12E0100363 | 'Clivia' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 3 | 12E0100363 ** |
| 35 | 53506 | 12E0100391 | 'Blue Tit Magor' | Rhododendron impeditum Balf. f. & W. W. Sm. | United Kingdom | | 3 | 12E0100391 ** |
| 36 | 53512 | 12E0100397 | 'Cynthia' | Rhododendron hybr. | United Kingdom | | 3 | 12E0100397 ** |
| 37 | 53525 | 12E0100410 | 'General D. Eisenhower' | Rhododendron griffithianum Wight | Netherlands | | 3 | 12E0100410 ** |
| 38 | 53540 | 12E0100425 | 'Radiant' | Rhododendron hybr. | Netherlands | | 3 | 12E0100425 ** |
| 39 | 53675 | 12E0100561 | 'Vuyk's Rosyred' | Rhododendron hybr. | unknown | | 3 | 12E0100561 ** |
| 40 | 53676 | 12E0100562 | 'Ramapo' | Rhododendron minus Michx. var. minus | unknown | | 3 | 12E0100562 ** |
| 41 | 53679 | 12E0100565 | 'Buchlovice' | Rhododendron impeditum Balf. f. & W. W. Sm. | Czechoslovakia | | 3 | 12E0100565 ** |
| 42 | 53681 | 12E0100567 | 'Signalgluehen' | Rhododendron hybr. | Germany | | 3 | 12E0100567 ** |
| 43 | 53685 | 12E0100604 | 'Profesor Jersov' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 3 | 12E0100604 ** |
| 44 | 53686 | 12E0100605 | 'Labe' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 3 | 12E0100605 ** |
| 45 | 53688 | 12E0100607 | 'Orlice' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 3 | 12E0100607 ** |
| 46 | 53689 | 12E0100608 | 'Oslava' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 3 | 12E0100608 ** |
| 47 | 53690 | 12E0100609 | 'Otava' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 3 | 12E0100609 ** |
| 48 | 53691 | 12E0100610 | 'Sazava' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 3 | 12E0100610 ** |
| 49 | 53693 | 12E0100612 | 'Ledikanense' | Rhododendron yedoense Maxim. var. poukhanense (H. Lév.) Nakai | Czechoslovakia | | 3 | 12E0100612 ** |
| 50 | 53695 | 12E0100702 | 'Largo' | Rhododendron forrestii Balf. f. ex Diels | Czechoslovakia | | 3 | 12E0100702 ** |
| 51 | 53696 | 12E0100703 | 'Ma vlast' | Rhododendron forrestii Balf. f. ex Diels | Czechoslovakia | | 3 | 12E0100703 ** |
| 52 | 53713 | 12E0100817 | 'Multimaculatum' | Rhododendron ponticum L. | United Kingdom | | 3 | 12E0100817 ** |
| 53 | 53754 | 12E0100858 | 'Bezdez' | Rhododendron ponticum L. | Czech Republic | | 3 | 12E0100858 ** |