| Name | Systremma natans (Tode) Theissen & Sydow |
| Authorship | (Tode) Theissen & Sydow |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Systremma |
| Citation | 1915 Ann. Mycol. 13(3-4): 330 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Systremma natans (Tode) Theissen & Sydow |
| Identification made in | [no date] (1) |