| Name | Plagiothecium undulatum subsp. subneckeroideum Kindberg |
| Authorship | Kindberg |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Plagiothecium undulatum (Hedwig) Schimper |
| Citation | 1909 Rev. Bryol. 36: 42 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Plagiothecium undulatum subsp. subneckeroideum Kindberg |
| Identification made in | [no date] (1) |