| Name | Closterium ralfsii var. hybridum Rabenhorst |
| Authorship | Rabenhorst |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Closterium ralfsii Brébisson ex Ralfs |
| Remarks | Created from Taxon Name Import: Closterium ralfsii var. hybridum Rabenhorst |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Closterium ralfsii var. hybridum Rabenhorst |
| Identification made in | [no date] (2) |