| 0 | 53117 | 12E0100002 | 'Antonin Dvorak' | Rhododendron smirnowii Trautv. | Czechoslovakia | | 7 | 12E0100002 ** |
| 1 | 53130 | 12E0100015 | 'Marie Oliva Schlickova' | Rhododendron decorum Franch. | Czechoslovakia | | 7 | 12E0100015 ** |
| 2 | 53134 | 12E0100019 | 'Profesor Jelinek' | Rhododendron smirnowii Trautv. | Czechoslovakia | | 7 | 12E0100019 ** |
| 3 | 53194 | 12E0100079 | 'Quapp' | Rhododendron hybr. | Germany | | 7 | 12E0100079 ** |
| 4 | 53199 | 12E0100084 | 'Verbesserte Adriaan Koster' | Rhododendron hybr. | Netherlands | | 7 | 12E0100084 ** |
| 5 | 53271 | 12E0100156 | 'Harvest Moon' | Rhododendron campylocarpum Hook. f. | Netherlands | | 7 | 12E0100156 ** |
| 6 | 53304 | 12E0100189 | 'Daniela' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 7 | 12E0100189 ** |
| 7 | 53322 | 12E0100207 | 'Mrs P. den Ouden' | Rhododendron hybr. | Netherlands | | 7 | 12E0100207 ** |
| 8 | 53331 | 12E0100216 | 'Cannon's Double' | Rhododendron hybr. | United States | | 7 | 12E0100216 ** |
| 9 | 53375 | 12E0100260 | 'Maharani' | Rhododendron hybr. | Germany | | 7 | 12E0100260 ** |
| 10 | 53463 | 12E0100348 | 'Polarnacht' | Rhododendron hybr. | Germany | | 7 | 12E0100348 ** |
| 11 | 53477 | 12E0100362 | 'Morgenrot' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 7 | 12E0100362 ** |
| 12 | 53589 | 12E0100474 | 'Cecile' | Rhododendron hybr. | United Kingdom | | 7 | 12E0100474 ** |
| 13 | 53639 | 12E0100524 | 'Hachmann's Estrella' | Rhododendron hybr. | Germany | | 7 | 12E0100524 ** |
| 14 | 53675 | 12E0100561 | 'Vuyk's Rosyred' | Rhododendron hybr. | unknown | | 7 | 12E0100561 ** |
| 15 | 53682 | 12E0100601 | 'Blanice' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 7 | 12E0100601 ** |
| 16 | 53686 | 12E0100605 | 'Labe' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 7 | 12E0100605 ** |
| 17 | 53692 | 12E0100611 | 'Vltava' | Rhododendron obtusum (Lindl.) Planch. | Czechoslovakia | | 7 | 12E0100611 ** |
| 18 | 53712 | 12E0100816 | 'Madame Albert van Hecke' | Rhododendron kaempferi Planch. | Belgium | | 7 | 12E0100816 ** |
| 19 | 53746 | 12E0100850 | 'Fuellhorn' | Rhododendron hybr. | Germany | | 7 | 12E0100850 ** |
| 20 | 67928 | 12E0100897 | 'Kozakov' | Rhododendron hybr. | Czech Republic | | 7 | 12E0100897 ** |