| Name | Plagiochila massalongoana f. deciduifolia Schiffner |
| Authorship | Schiffner |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Plagiochila massalongoana Schiffner |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Plagiochila massalongoana f. deciduifolia Schiffner |
| Identification made in | [no date] (1) |