| Rhododendron megacalyx Balf.f. & Kingdon-Ward | J. F. C. Rock 22012 | China. Xizang. Mt. Kenichunpo, eastern and western slopes, Salwin and Irrawady divide. | | 04394764 |  |
| Rhododendron megacalyx Balf.f. & Kingdon-Ward | J. F. C. Rock 22440 | China. Xizang. Mt. Kenichunpo; mountains west of Champutong, Upper Salwin River. | | 04394763 |  |
| Rhododendron megacalyx Balf.f. & Kingdon-Ward | J. F. C. Rock 17083 | China. Yunnan. Mount Chi-Ch'a or Gitsa Ngulu, west of the Mekong and north of Wei-Hsi. | | 04386466 |  |
| Rhododendron megacalyx Balf.f. & Kingdon-Ward | J. F. C. Rock 18398 | China. Yunnan. Mount Gitsa, west of the Mekong and north of Wei-Hsi. | | 04386465 |  |
