| TaxonId | Name | Volume | Year | ||
| 250059897 | Rhododendron cloiophorum var. mannophorum | Vol.14 | 2005 | ||
| 250059898 | Rhododendron cloiophorum var. roseotinctum | Vol.14 | 2005 | ||
| 242343703 | Rhododendron coccinopeplum | Vol.14 | 2005 | ||
| 242343704 | Rhododendron codonanthum | 腺蕊杜鹃 | Vol.14 | 2005 | |
| 242343705 | Rhododendron coelicum | 滇缅杜鹃 | Vol.14 | 2005 | |
| 200016386 | Rhododendron coeloneurum | 粗脉杜鹃 | Vol.14 | 2005 | |
| 242343706 | Rhododendron colletum | Vol.14 | 2005 | ||
| 242343707 | Rhododendron comisteum | 砾石杜鹃 | Vol.14 | 2005 | |
| 242343708 | Rhododendron commodum | Vol.14 | 2005 | ||
| 242343709 | Rhododendron compactum | Vol.14 | 2005 | ||
| 242343710 | Rhododendron complexum | 环绕杜鹃 | Vol.14 | 2005 | |
| 242343711 | Rhododendron concatenans | Vol.14 | 2005 | ||
| 242343712 | Rhododendron concinnum | 秀雅杜鹃 | Vol.14 | 2005 | |
| 242444874 | Rhododendron concinnum f. laetevirens | Vol.14 | 2005 | ||
| 242343713 | Rhododendron concinnum var. benthamianum | Vol.14 | 2005 |
