| Name | Rhododendron sumatranum Merrill |
| Authorship | Merrill |
| Rank | Species |
| Placed in | Rhododendron Linnaeus |
| Citation | 1935 Pap. Michigan Acad. Sci. 1933, xix. 182 (1934); J. J. Smith in Bull. Jard.Bot.Buitenz. Ser. III.xiii.450 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Rhododendron sumatranum Merrill |
| Identification made in | [no date] (4) |