| Name | Cosmarium callosissimum var. americanum Scott & Grönblad |
| Authorship | Scott & Grönblad |
| Rank | Variety |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium callosissimum A.M.Scott & Grönblad |
| Remarks | Created from Taxon Name Import: Cosmarium callosissimum var. americanum Scott & Grönblad |
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