| Cydonia cathayensis Hemsl. | Chaenomeles cathayensis (Hemsl.) C. K. Schneid. | | | Cydonia cathayensis Hemsl. | Chaenomeles cathayensis (Hemsl.) C. K. Schneid. | 12774 | 10006 |
| Cydonia japonica (Thunb.) Pers. | Chaenomeles japonica (Thunb.) Lindl. ex Spach | | | Cydonia japonica (Thunb.) Pers. | Chaenomeles japonica (Thunb.) Lindl. ex Spach | 12775 | 10007 |
| Cydonia lagenaria Loisel. | Chaenomeles japonica (Thunb.) Lindl. ex Spach | | | Cydonia lagenaria Loisel. | Chaenomeles japonica (Thunb.) Lindl. ex Spach | 12776 | 10007 |
| Cydonia maulei T. Moore var. superba Frahm | Chaenomeles ×superba (Frahm) Rehder | | i | Cydonia maulei T. Moore var.superba Frahm | Chaenomeles superba (Frahm) Rehder | 12778 | 10015 |
| Cydonia oblonga Mill. | | a | | Cydonia oblonga Mill. | | 12779 | |
| Cydonia sinensis Thouin | Pseudocydonia sinensis (Thouin) C. K. Schneid. | | | Cydonia sinensis Thouin | Pseudocydonia sinensis (Thouin) C. K. Schneid. | 12780 | 318589 |
| Cydonia ×veitchii Trab. | ×Pyronia veitchii (Trab.) Guillaumin | | | Cydonia veitchii Trab. | Pyronia veitchii (Trab.) Guillaumin | 12781 | 104463 |
| Cydonia vulgaris Pers. | Cydonia oblonga Mill. | | | Cydonia vulgaris Pers. | Cydonia oblonga Mill. | 12782 | 12779 |
| Cydonia spp. | | a | | Cydonia spp. | | 310083 | |
| Cydonia maulei (Mast.) T. Moore f. perfecta Froebel ex Olbrich | Chaenomeles ×superba (Frahm) Rehder | | i | Cydonia maulei (Mast.) T. Moore f. perfecta Froebel ex Olbrich | Chaenomeles superba (Frahm) Rehder | 310663 | 10015 |
| Cydonia speciosa Sweet | Chaenomeles speciosa (Sweet) Nakai | | | Cydonia speciosa Sweet | Chaenomeles speciosa (Sweet) Nakai | 313671 | 10014 |
| Cydonia maulei (Mast.) T. Moore var. maulei | Chaenomeles japonica (Thunb.) Lindl. ex Spach | | i | Cydonia maulei (Mast.) T. Moore var.maulei | Chaenomeles japonica (Thunb.) Lindl. ex Spach | 482314 | 10007 |
| Cydonia maulei (Mast.) T. Moore | Chaenomeles japonica (Thunb.) Lindl. ex Spach | | | Cydonia maulei (Mast.) T. Moore | Chaenomeles japonica (Thunb.) Lindl. ex Spach | 482315 | 10007 |
| Cydonia maulei (Mast.) T. Moore f. maulei | Chaenomeles japonica (Thunb.) Lindl. ex Spach | | i | Cydonia maulei (Mast.) T. Moore f. maulei | Chaenomeles japonica (Thunb.) Lindl. ex Spach | 482316 | 10007 |