| Name | Rhododendron rex subsp. arizelum (I. B. Balfour) Forrest & D. F. Chamberlain |
| Authorship | (I. B. Balfour) Forrest & D. F. Chamberlain |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Rhododendron rex H. Léveillé |
| Holdings | 18 Specimens held in the Harvard University Herbaria identified as Rhododendron rex subsp. arizelum (I. B. Balfour) Forrest & D. F. Chamberlain |
| Identification made in | [no date] (18) |
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