| TaxonId | Name | Volume | Year | ||
| 242343714 | Rhododendron concinnum var. lepidanthum | Vol.14 | 2005 | ||
| 242343715 | Rhododendron concinnum var. pseudoyanthinum | Vol.14 | 2005 | ||
| 242444882 | Rhododendron confertissimum | Vol.14 | 2005 | ||
| 242343716 | Rhododendron cookeanum | Vol.14 | 2005 | ||
| 242343717 | Rhododendron coombense | Vol.14 | 2005 | ||
| 242343719 | Rhododendron cordatum | Vol.14 | 2005 | ||
| 200016388 | Rhododendron coriaceum | 革叶杜鹃 | Vol.14 | 2005 | |
| 242343721 | Rhododendron coryanum | 光蕊杜鹃 | Vol.14 | 2005 | |
| 200016389 | Rhododendron coryphaeum | Vol.14 | 2005 | ||
| 242343722 | Rhododendron cosmetum | Vol.14 | 2005 | ||
| 242343723 | Rhododendron costulatum | Vol.14 | 2005 | ||
| 242343724 | Rhododendron crassimedium | 棒柱杜鹃 | Vol.14 | 2005 | |
| 242343725 | Rhododendron crassistylum | 粗柱杜鹃 | Vol.14 | 2005 | |
| 242343726 | Rhododendron crassum | Vol.14 | 2005 | ||
| 242343727 | Rhododendron cremastum | Vol.14 | 2005 |
