| Name | Rhododendron thomsonii subsp. lopsangianum (Cowan) D. F. Chamberlain |
| Authorship | (Cowan) D. F. Chamberlain |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Rhododendron thomsonii Hooker f. |
| GUID | urn:lsid:ipni.org:names:921411-1 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Rhododendron thomsonii subsp. lopsangianum (Cowan) D. F. Chamberlain |
| Identification made in | [no date] (5) |