| Name | Fucus virsoides f. angusta Schiffner |
| Authorship | Schiffner |
| Rank | Forma |
| Placed in | Fucus virsoides J. Agardh |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Fucus virsoides f. angusta Schiffner |
| Identification made in | [no date] (1) |
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