| Name | Schizosiphon gracilis Hilse |
| Authorship | Hilse |
| Rank | Species |
| NomenclaturalStatus | NomInvalid |
| Placed in | Schizosiphon Kützing |
| Remarks | É. Bornet& C. Flahault (Ann. Sci. Nat. Bot. ser. 7, 3: 366. 1886) treat Schizosiphon gracilis Hilse as a synonym of Calothrix parietina Thuret ex Bornet & Flahault |
| Citation | 1865 Fl. Eur. Alg. 2: 237 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Schizosiphon gracilis Hilse |
| Identification made in | [no date] (1) |
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