| Name | Rhododendron chamaethomsonii var. chamaethauma (Tagg & Forrest) Cowan & Davidian |
| Authorship | (Tagg & Forrest) Cowan & Davidian |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Rhododendron chamaethomsonii (Tagg & Forrest) Cowan & Davidian |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Rhododendron chamaethomsonii var. chamaethauma (Tagg & Forrest) Cowan & Davidian |
| Identification made in | [no date] (2) |