| 0 | 53199 | 12E0100084 | 'Verbesserte Adriaan Koster' | Rhododendron hybr. | Netherlands | | 0 | 12E0100084 ** |
| 1 | 53253 | 12E0100138 | 'Sir Charles Butler' | Rhododendron fortunei Lindl. subsp. fortunei | unknown | | 0 | 12E0100138 ** |
| 2 | 53303 | 12E0100188 | 'Canary' | Rhododendron hybr. | Netherlands | | 0 | 12E0100188 ** |
| 3 | 53313 | 12E0100198 | 'Kantilene' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 0 | 12E0100198 ** |
| 4 | 53341 | 12E0100226 | 'Royal Pink' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 0 | 12E0100226 ** |
| 5 | 53354 | 12E0100239 | 'Blueshine Girl' | Rhododendron wardii W. W. Sm. | Germany | | 0 | 12E0100239 ** |
| 6 | 53360 | 12E0100245 | 'Volker' | Rhododendron hybr. | Germany | | 0 | 12E0100245 ** |
| 7 | 53427 | 12E0100312 | 'Vater Boehlje' | Rhododendron hybr. | Germany | | 0 | 12E0100312 ** |
| 8 | 53437 | 12E0100322 | 'Sammetglut' | Rhododendron hybr. | Germany | | 0 | 12E0100322 ** |
| 9 | 53439 | 12E0100324 | 'Ursula Seidel' | Rhododendron hybr. | Germany | | 0 | 12E0100324 ** |
| 10 | 53448 | 12E0100333 | 'Tibet' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 0 | 12E0100333 ** |
| 11 | 53452 | 12E0100337 | 'Ovation' | Rhododendron haematodes Franch. | United Kingdom | | 0 | 12E0100337 ** |
| 12 | 53481 | 12E0100366 | 'Eggert Rohwer' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 0 | 12E0100366 ** |
| 13 | 53502 | 12E0100387 | 'Berlin' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 0 | 12E0100387 ** |
| 14 | 53568 | 12E0100453 | 'Hachmann's Rosenelfe' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 0 | 12E0100453 ** |
| 15 | 53591 | 12E0100476 | 'Fasching' | Rhododendron hybr. | Germany | | 0 | 12E0100476 ** |
| 16 | 53602 | 12E0100487 | 'Hachmann's Harlekin' | Rhododendron hybr. | Germany | | 0 | 12E0100487 ** |
| 17 | 53603 | 12E0100488 | 'Homebush' | Rhododendron hybr. | United Kingdom | | 0 | 12E0100488 ** |
| 18 | 53605 | 12E0100490 | 'Klondyke' | Rhododendron hybr. | United Kingdom | | 0 | 12E0100490 ** |
| 19 | 53609 | 12E0100494 | 'Azurika' | Rhododendron impeditum Balf. f. & W. W. Sm. | unknown | | 0 | 12E0100494 ** |
| 20 | 53610 | 12E0100495 | 'Azurwolke' | Rhododendron hybr. | unknown | | 0 | 12E0100495 ** |
| 21 | 53625 | 12E0100510 | 'Corneille' | Rhododendron hybr. | unknown | | 0 | 12E0100510 ** |
| 22 | 53645 | 12E0100531 | 'Satschiko' | Rhododendron hybr. | Germany | | 0 | 12E0100531 ** |
| 23 | 53660 | 12E0100546 | 'Hinodegiri' | Rhododendron hybr. | Japan | | 0 | 12E0100546 ** |
| 24 | 53667 | 12E0100553 | 'Fuego' | Rhododendron haematodes Franch. | Germany | | 0 | 12E0100553 ** |
| 25 | 53672 | 12E0100558 | 'Silvester' | Rhododendron hybr. | Netherlands | | 0 | 12E0100558 ** |
| 26 | 53676 | 12E0100562 | 'Ramapo' | Rhododendron minus Michx. var. minus | unknown | | 0 | 12E0100562 ** |
| 27 | 53678 | 12E0100564 | 'Krumlov' | Rhododendron impeditum Balf. f. & W. W. Sm. | Czechoslovakia | | 0 | 12E0100564 ** |
| 28 | 53679 | 12E0100565 | 'Buchlovice' | Rhododendron impeditum Balf. f. & W. W. Sm. | Czechoslovakia | | 0 | 12E0100565 ** |
| 29 | 53695 | 12E0100702 | 'Largo' | Rhododendron forrestii Balf. f. ex Diels | Czechoslovakia | | 0 | 12E0100702 ** |
| 30 | 53697 | 12E0100801 | 'Sychrov' | Rhododendron impeditum Balf. f. & W. W. Sm. | Czechoslovakia | | 0 | 12E0100801 ** |
| 31 | 53700 | 12E0100804 | 'Ann Lindsay' | Rhododendron hybr. | Germany | | 0 | 12E0100804 ** |
| 32 | 53712 | 12E0100816 | 'Madame Albert van Hecke' | Rhododendron kaempferi Planch. | Belgium | | 0 | 12E0100816 ** |
| 33 | 65846 | 12E0100888 | 'Snezka' | Rhododendron obtusum (Lindl.) Planch. | Czech Republic | | 0 | 12E0100888 ** |
| 34 | 66597 | 12E0100895 | 'Rotkaeppchen' | Rhododendron hybr. | Germany | | 0 | 12E0100895 ** |