| japan | | rhododendron japonicum f. flavum | forma | 10 | 0 |
| japan | aichi prefecture | rhododendron japonicum | species | 3 | 0 |
| japan | fukushima prefecture | rhododendron japonicum | species | 2 | 0 |
| japan | gunma prefecture | rhododendron japonicum | species | 2 | 0 |
| japan | hiroshima prefecture | rhododendron japonicum | species | 2 | 0 |
| japan | iwate prefecture | rhododendron japonicum | species | 2 | 0 |
| japan | nagano prefecture | rhododendron japonicum | species | 4 | 0 |
| japan | niigata prefecture | rhododendron japonicum | species | 2 | 0 |