| Family | Ericaceae |
| Scientific name | Rhododendron kaempferi Planchon var. macrogemma Nakai |
| Synonyms | Rhododendron macrogemma Nakai; Rhododendron obtusum (Lindley) Planchon var. macrogemma (Nakai) Kitamura |
| Common name | (Japanese common name) ohshima-tutuji [Izu-Ohshima Island tutuji (tutuji = Rhododendron plants)] |
| (English common name) none | |
| Distribution | (Japan) Honshu (Izu Peninsular), Izu Islands |
| (Other nations) none | |
| Chromosomal number | unknown |
| Description | Plants 1-4m. Flowers orange or purple corollas 4-5cm, flowering in May to June. Hemideciduous. Shrub. |
| Reference | Rhododendron kaempferi Planch. |
| Note | Endemic to Japan. |
| May 2007 at Koishikawa Botanical Garden |
May 2007 at Koishikawa Botanical Garden |
May 2007 at Koishikawa Botanical Garden |
| May 2007 at Koishikawa Botanical Garden |