| Name | Polysiphonia opaca var. repens Kützing |
| Authorship | Kützing |
| Rank | Variety |
| Placed in | Polysiphonia opaca (C.Agardh) Moris & De Notaris |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Polysiphonia opaca var. repens Kützing |
| Identification made in | [no date] (2) |
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