| Name | Cosmarium ungerianum f. minus D. B. Williamson |
| Authorship | D. B. Williamson |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium ungerianum (Nägeli) de Bary |
| Remarks | Created from Taxon Name Import: Cosmarium ungerianum f. minus D. B. Williamson |
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