| Name | Irlbachia alata subsp. arborea (Spruce ex Progel) Persoon & Maas |
| Authorship | (Spruce ex Progel) Persoon & Maas |
| Rank | Subspecies |
| NomenclaturalStatus | Unknown |
| Placed in | Irlbachia alata (Aublet) Maas |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Irlbachia alata subsp. arborea (Spruce ex Progel) Persoon & Maas |
| Identification made in | [no date] (1) |
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