| Name | Rhododendron calostrotum subsp. riparium (F. K. Ward) Cullen |
| Authorship | (F. K. Ward) Cullen |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Rhododendron calostrotum I. B. Balfour & F. K. Ward |
| Holdings | 9 Specimens held in the Harvard University Herbaria identified as Rhododendron calostrotum subsp. riparium (F. K. Ward) Cullen |
| Identification made in | [no date] (9) |
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