| TaxonId | Name | Volume | Year | ||
| 242343728 | Rhododendron cremnophilum | Vol.14 | 2005 | ||
| 242445360 | Rhododendron crenatum | Vol.14 | 2005 | ||
| 242343729 | Rhododendron cretaceum | 白枝杜鹃 | Vol.14 | 2005 | |
| 200016390 | Rhododendron crinigerum | 长粗毛杜鹃 | Vol.14 | 2005 | |
| 242343730 | Rhododendron crinigerum var. crinigerum | 长粗毛杜鹃(原变种) | Vol.14 | 2005 | |
| 242343731 | Rhododendron crinigerum var. euadenium | 腺背长粗毛杜鹃 | Vol.14 | 2005 | |
| 242343732 | Rhododendron croceum | Vol.14 | 2005 | ||
| 242343733 | Rhododendron cruentum | Vol.14 | 2005 | ||
| 242343734 | Rhododendron cucullatum | Vol.14 | 2005 | ||
| 242343735 | Rhododendron cuneatum | 楔叶杜鹃 | Vol.14 | 2005 | |
| 242343736 | Rhododendron cuprescens | Vol.14 | 2005 | ||
| 200016391 | Rhododendron cyanocarpum | 蓝果杜鹃 | Vol.14 | 2005 | |
| 242343738 | Rhododendron cyanocarpum var. eriphyllum | Vol.14 | 2005 | ||
| 242343739 | Rhododendron cyclium | Vol.14 | 2005 | ||
| 242343740 | Rhododendron cymbomorphum | Vol.14 | 2005 |
