| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Rhododendron maddenii subsp. crassum (Franch.) Cullen | F. Kingdon-Ward 17700 18 Jun 1948 | India. Sirhoi. | 02651499 |  | |
| Rhododendron maddenii subsp. crassum (Franch.) Cullen | F. Kingdon-Ward 400 13 Mar 1939 | Myanmar. Panwa Pass. | 02651500 |  | |
| Rhododendron maddenii subsp. crassum (Franch.) Cullen | F. Kingdon-Ward 17217 06 Apr 1948 | India. Manipur. Sirhoi. | 02651498 |  | |
| Rhododendron maddenii subsp. crassum (Franch.) Cullen | F. Kingdon-Ward 17818 18 Jul 1948 | India. Sirhoi. | 02651497 |  | |
| Rhododendron maddenii subsp. crassum (Franch.) Cullen | J. F. C. Rock 22334 | China. Xizang. Mountains of Tjonatong, Upper Salwin River. | 04394761 |  | |
| Rhododendron maddenii subsp. crassum (Franch.) Cullen | 04386420 |  | |||
| Rhododendron maddenii subsp. crassum (Franch.) Cullen | 04386419 |  |
