| 0 | 53136 | 12E0100021 | 'Saba' | Rhododendron decorum Franch. | Czechoslovakia | | 1 | 12E0100021 ** |
| 1 | 53144 | 12E0100029 | 'Arthur Bedford' | Rhododendron ponticum L. | United Kingdom | | 1 | 12E0100029 ** |
| 2 | 53157 | 12E0100042 | 'Edward S. Rand' | Rhododendron catawbiense Michx. | United Kingdom | | 1 | 12E0100042 ** |
| 3 | 53191 | 12E0100076 | 'Picturatum' | Rhododendron maximum L. | United Kingdom | | 1 | 12E0100076 ** |
| 4 | 53216 | 12E0100101 | 'Bashful' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | United Kingdom | | 1 | 12E0100101 ** |
| 5 | 53241 | 12E0100126 | 'Duchess of York' | Rhododendron fortunei Lindl. subsp. fortunei | unknown | | 1 | 12E0100126 ** |
| 6 | 53246 | 12E0100131 | 'Emma' | Rhododendron catawbiense Michx. | Germany | | 1 | 12E0100131 ** |
| 7 | 53248 | 12E0100133 | 'Erika' | Rhododendron brachycarpum D. Don ex G. Don | Germany | | 1 | 12E0100133 ** |
| 8 | 53253 | 12E0100138 | 'Sir Charles Butler' | Rhododendron fortunei Lindl. subsp. fortunei | unknown | | 1 | 12E0100138 ** |
| 9 | 53284 | 12E0100169 | 'Ponticum Roseum' | Rhododendron hybr. | United States | | 1 | 12E0100169 ** |
| 10 | 53329 | 12E0100214 | 'Polar Star' | Rhododendron smirnowii Trautv. | Netherlands | | 1 | 12E0100214 ** |
| 11 | 53331 | 12E0100216 | 'Cannon's Double' | Rhododendron hybr. | United States | | 1 | 12E0100216 ** |
| 12 | 53347 | 12E0100232 | 'Sonatine' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 1 | 12E0100232 ** |
| 13 | 53386 | 12E0100271 | 'Rendezvous' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 1 | 12E0100271 ** |
| 14 | 53391 | 12E0100276 | 'Schneebukett' | Rhododendron hybr. | Germany | | 1 | 12E0100276 ** |
| 15 | 53397 | 12E0100282 | 'Admiral Vanessa' | Rhododendron fortunei Lindl. subsp. discolor (Franch.) D. F. Chamb. | Germany | | 1 | 12E0100282 ** |
| 16 | 53427 | 12E0100312 | 'Vater Boehlje' | Rhododendron hybr. | Germany | | 1 | 12E0100312 ** |
| 17 | 53468 | 12E0100353 | 'Schneeauge' | Rhododendron hybr. | Germany | | 1 | 12E0100353 ** |
| 18 | 53469 | 12E0100354 | 'Hachmann's Diadem' | Rhododendron hybr. | Germany | | 1 | 12E0100354 ** |
| 19 | 53478 | 12E0100363 | 'Clivia' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 1 | 12E0100363 ** |
| 20 | 53538 | 12E0100423 | 'Janet Blair' | Rhododendron hybr. | United States | | 1 | 12E0100423 ** |
| 21 | 53566 | 12E0100451 | 'Roland' | Rhododendron hybr. | United Kingdom | | 1 | 12E0100451 ** |
| 22 | 53574 | 12E0100459 | 'Sneezy' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | United Kingdom | | 1 | 12E0100459 ** |
| 23 | 53631 | 12E0100516 | 'Doria' | Rhododendron brachycarpum D. Don ex G. Don | Germany | | 1 | 12E0100516 ** |
| 24 | 53758 | 12E0100862 | 'Becov' | Rhododendron hybr. | Czech Republic | | 1 | 12E0100862 ** |