| Name | Cosmarium porteanum W. Archer |
| Authorship | W. Archer |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium |
| Contains | Cosmarium porteanum var. brasiliense Wille Cosmarium porteanum var. majus A. M. Scott & Prescott Cosmarium porteanum var. nephroideum Wittrock Cosmarium porteanum var. orthostichum Schmidle |
| Remarks | Created from Taxon Name Import: Cosmarium porteanum W. Archer |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cosmarium porteanum W. Archer |
| Identification made in | [no date] (1) |
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