| Name | Ceramium rubrum var. ambiguum Schiffner |
| Authorship | Schiffner |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Ceramium rubrum C. Agardh |
| Remarks | Created from Taxon Name Import: Ceramium rubrum var. ambiguum Schiffner |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Ceramium rubrum var. ambiguum Schiffner |
| Identification made in | [no date] (1) |