| Name | Cosmarium quadrifarium var. simplex Willi Krieger |
| Authorship | Willi Krieger |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Cosmarium quadrifarium P. Lundell |
| Citation | 1932 Arch. Hydrobiol. Suppl. 11: 184 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cosmarium quadrifarium var. simplex Willi Krieger |
| Identification made in | [no date] (1) |
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