| 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) | 
