| Rhododendron albrechtii Maxim. | | a | | Rhododendron albrechtiiMaxim. | |
| Rhododendron pentaphyllum Maxim. | | a | | Rhododendron pentaphyllumMaxim. | |
| Rhododendron pentaphyllum Maxim. var. nikoense Komatsu | | a | i | Rhododendron pentaphyllumMaxim. var.nikoense Komatsu | |
| Rhododendron quinquefolium Bisset & S. Moore | | a | | Rhododendron quinquefoliumBisset & S. Moore | |
| Rhododendron schlippenbachii Maxim. | | a | | Rhododendron schlippenbachiiMaxim. | |
| Rhododendron vaseyi A. Gray | | a | | Rhododendron vaseyiA. Gray | |
| Rhododendron albiflorum Hook. | | a | | Rhododendron albiflorumHook. | |
| Rhododendron benhallii Craven | | a | | Rhododendron benhalliiCraven | |
| Rhododendron menziesii Craven | | a | | Rhododendron menziesiiCraven | |
| Rhododendron menziesii Craven subsp. glabellum (A. Gray) Craven | | a | i | Rhododendron menziesiiCraven subsp. glabellum (A. Gray) Craven | |
| Rhododendron menziesii Craven subsp. menziesii | | a | i | Rhododendron menziesiiCraven subsp. menziesii | |
| Rhododendron multiflorum (Maxim.) Craven var. purpureum (Makino) Craven | | a | i | Rhododendron multiflorum(Maxim.) Craven var.purpureum (Makino) Craven | |
| Rhododendron multiflorum (Maxim.) Craven f. bicolor (Makino) Craven | | a | i | Rhododendron multiflorum(Maxim.) Craven f. bicolor (Makino) Craven | |
| Rhododendron multiflorum (Maxim.) Craven | | a | | Rhododendron multiflorum(Maxim.) Craven | |
| Rhododendron pentandrum (Maxim.) Craven | | a | | Rhododendron pentandrum(Maxim.) Craven | |
| Rhododendron pilosum (Michx.) Craven | | a | | Rhododendron pilosum(Michx.) Craven | |
| Rhododendron kroniae Craven | | a | | Rhododendron kroniaeCraven | |