| Name | Ptychomnion aciculare f. longifolia Thériot |
| Authorship | Thériot |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Ptychomnion aciculare (Bridel) Mitten |
| Citation | 1914 Nova Caledonia, Bot. 1(1): 27 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Ptychomnion aciculare f. longifolia Thériot |
| Identification made in | [no date] (1) |