| Name | Rhododendron maddenii subsp. crassum (Franchet) Cullen |
| Authorship | (Franchet) Cullen |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Rhododendron maddenii Hooker f. |
| GUID | urn:lsid:ipni.org:names:880183-1 |
| Holdings | 26 Specimens held in the Harvard University Herbaria identified as Rhododendron maddenii subsp. crassum (Franchet) Cullen |
| Identification made in | [no date] (24), 2005 (1), 2006 (1) |