| Name | Ectocarpus firmus (C. Agardh) J. Agardh |
| Authorship | (C. Agardh) J. Agardh |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Ectocarpus Lyngbye |
| Contains | Ectocarpus firmus var. rupincola Areschoug Ectocarpus firmus f. vernalis Areschoug |
| Remarks | Created from Taxon Name Import: Ectocarpus firmus (C. Agardh) J. Agardh |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Ectocarpus firmus (C. Agardh) J. Agardh |
| Identification made in | [no date] (1) |