| Name | Cosmarium quadratum f. boreale Croasdale |
| Authorship | Croasdale |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium quadratum Ralfs ex Ralfs |
| Remarks | Created from Taxon Name Import: Cosmarium quadratum f. boreale Croasdale |
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