| 0 | 53154 | 12E0100039 | 'Cunningham's White' | Rhododendron hybr. | United Kingdom | | 3 | 12E0100039 ** |
| 1 | 53214 | 12E0100099 | 'Baden Baden' | Rhododendron forrestii Balf. f. ex Diels subsp. forrestii | Germany | | 3 | 12E0100099 ** |
| 2 | 53221 | 12E0100106 | 'Blue Tit' | Rhododendron impeditum Balf. f. & W. W. Sm. | United Kingdom | | 3 | 12E0100106 ** |
| 3 | 53283 | 12E0100168 | 'May Firth' | Rhododendron hybr. | unknown | | 3 | 12E0100168 ** |
| 4 | 53303 | 12E0100188 | 'Canary' | Rhododendron hybr. | Netherlands | | 3 | 12E0100188 ** |
| 5 | 53311 | 12E0100196 | 'Jacksonii' | Rhododendron caucasicum Pall. | unknown | | 3 | 12E0100196 ** |
| 6 | 53341 | 12E0100226 | 'Royal Pink' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 3 | 12E0100226 ** |
| 7 | 53349 | 12E0100234 | 'Scarlet Wonder' | Rhododendron forrestii Balf. f. ex Diels subsp. forrestii | Germany | | 3 | 12E0100234 ** |
| 8 | 53357 | 12E0100242 | 'Elisabeth Hobbie' | Rhododendron forrestii Balf. f. ex Diels subsp. forrestii | Germany | | 3 | 12E0100242 ** |
| 9 | 53375 | 12E0100260 | 'Maharani' | Rhododendron hybr. | Germany | | 3 | 12E0100260 ** |
| 10 | 53412 | 12E0100297 | 'Caucasicum Pictum' | Rhododendron caucasicum Pall. | United Kingdom | | 3 | 12E0100297 ** |
| 11 | 53448 | 12E0100333 | 'Tibet' | Rhododendron williamsianum Rehder & E. H. Wilson | Germany | | 3 | 12E0100333 ** |
| 12 | 53452 | 12E0100337 | 'Ovation' | Rhododendron haematodes Franch. | United Kingdom | | 3 | 12E0100337 ** |
| 13 | 53483 | 12E0100368 | 'Fruehlingsgold' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 3 | 12E0100368 ** |
| 14 | 53506 | 12E0100391 | 'Blue Tit Magor' | Rhododendron impeditum Balf. f. & W. W. Sm. | United Kingdom | | 3 | 12E0100391 ** |
| 15 | 53507 | 12E0100392 | 'Bluebird' | Rhododendron hybr. | United Kingdom | | 3 | 12E0100392 ** |
| 16 | 53508 | 12E0100393 | 'Buketta' | Rhododendron hybr. | Germany | | 3 | 12E0100393 ** |
| 17 | 53610 | 12E0100495 | 'Azurwolke' | Rhododendron hybr. | unknown | | 3 | 12E0100495 ** |
| 18 | 53613 | 12E0100498 | 'Blaauw's Pink' | Rhododendron hybr. | unknown | | 3 | 12E0100498 ** |
| 19 | 53618 | 12E0100503 | 'Campfire' | Rhododendron hybr. | unknown | | 3 | 12E0100503 ** |
| 20 | 53676 | 12E0100562 | 'Ramapo' | Rhododendron minus Michx. var. minus | unknown | | 3 | 12E0100562 ** |
| 21 | 53677 | 12E0100563 | 'Audia' | Rhododendron impeditum Balf. f. & W. W. Sm. | unknown | | 3 | 12E0100563 ** |
| 22 | 53678 | 12E0100564 | 'Krumlov' | Rhododendron impeditum Balf. f. & W. W. Sm. | Czechoslovakia | | 3 | 12E0100564 ** |
| 23 | 53679 | 12E0100565 | 'Buchlovice' | Rhododendron impeditum Balf. f. & W. W. Sm. | Czechoslovakia | | 3 | 12E0100565 ** |
| 24 | 53695 | 12E0100702 | 'Largo' | Rhododendron forrestii Balf. f. ex Diels | Czechoslovakia | | 3 | 12E0100702 ** |
| 25 | 53696 | 12E0100703 | 'Ma vlast' | Rhododendron forrestii Balf. f. ex Diels | Czechoslovakia | | 3 | 12E0100703 ** |
| 26 | 53697 | 12E0100801 | 'Sychrov' | Rhododendron impeditum Balf. f. & W. W. Sm. | Czechoslovakia | | 3 | 12E0100801 ** |
| 27 | 53729 | 12E0100833 | 'Taurus' | Rhododendron catawbiense Michx. | United States | | 3 | 12E0100833 ** |
| 28 | 53739 | 12E0100843 | 'Loket' | Rhododendron strigillosum Franch. | Czech Republic | | 3 | 12E0100843 ** |
| 29 | 53748 | 12E0100852 | 'Bouzov' | Rhododendron decorum Franch. | Czech Republic | | 3 | 12E0100852 ** |
| 30 | 53768 | 12E0100872 | 'Osmar' | Rhododendron williamsianum Rehder & E. H. Wilson | United Kingdom | | 3 | 12E0100872 ** |
| 31 | 53770 | 12E0100874 | 'Ursula Siems' | Rhododendron forrestii Balf. f. ex Diels | Germany | | 3 | 12E0100874 ** |
| 32 | 65918 | 12E0100893 | 'Hachmann's Mercator' | Rhododendron hybr. | Germany | | 3 | 12E0100893 ** |