| Name | Polysiphonia flexella var. acanthotricha (Kuetzing) Piccone |
| Authorship | (Kuetzing) Piccone |
| Rank | Variety |
| Placed in | Polysiphonia flexella (C. Agardh) J. Agardh |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Polysiphonia flexella var. acanthotricha (Kuetzing) Piccone |
| Identification made in | [no date] (1) |
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