| Name | Cosmarium tumidum f. subrectangulare West & G.S.West |
| Authorship | West & G. S. West |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium tumidum P. Lundell |
| Remarks | Created from Taxon Name Import: Cosmarium tumidum f. subrectangulare West & G.S.West |
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