| Name | Closterium didymotocum f. crassum Grönblad |
| Authorship | Grönblad (do not use) |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Closterium didymotocum Corda ex Ralfs |
| Remarks | Created from Taxon Name Import: Closterium didymotocum f. crassum Grönblad |