| Rhododendron amagianum (Makino) H. Hara | | a | | Rhododendron amagianum(Makino) H. Hara | |
| Rhododendron decandrum (Makino) Makino | | a | | Rhododendron decandrum(Makino) Makino | |
| Rhododendron dilatatum Miq. | | a | | Rhododendron dilatatumMiq. | |
| Rhododendron farrerae Tate ex Sweet | | a | | Rhododendron farreraeTate ex Sweet | |
| Rhododendron kiyosumense (Makino) Makino | | a | | Rhododendron kiyosumense(Makino) Makino | |
| Rhododendron mariesii Hemsl. & E. H. Wilson | | a | | Rhododendron mariesiiHemsl. & E. H. Wilson | |
| Rhododendron mayebarae Nakai & H. Hara | | a | | Rhododendron mayebaraeNakai & H. Hara | |
| Rhododendron nudipes Nakai | | a | | Rhododendron nudipesNakai | |
| Rhododendron reticulatum D. Don ex G. Don | | a | | Rhododendron reticulatumD. Don ex G. Don | |
| Rhododendron rhombicum Miq. | Rhododendron reticulatum D. Don ex G. Don | | | Rhododendron rhombicumMiq. | Rhododendron reticulatumD. Don ex G. Don |
| Rhododendron sanctum Nakai | | a | | Rhododendron sanctumNakai | |
| Rhododendron shikokianum Makino, nom. inval. | Rhododendron weyrichii Maxim. | | | Rhododendron shikokianumMakino, nom. inval. | Rhododendron weyrichiiMaxim. |
| Rhododendron weyrichii Maxim. | | a | | Rhododendron weyrichiiMaxim. | |
| Rhododendron dilatatum Miq. var. decandrum Makino | Rhododendron decandrum (Makino) Makino | | i | Rhododendron dilatatumMiq. var.decandrum Makino | Rhododendron decandrum(Makino) Makino |
| Rhododendron wadanum Makino | | a | | Rhododendron wadanumMakino | |