| Name | Porphyrosiphon notarisii Kützing ex Gomont |
| Authorship | Kützing ex Gomont |
| Rank | Species |
| Placed in | Porphyrosiphon Kützing ex Gomont |
| Citation | 1892 Ann. Sci. Nat., Bot. ser. 7, 15: 331 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Porphyrosiphon notarisii Kützing ex Gomont |
| Identification made in | [no date] (2) |
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