| Name | Ectocarpus confervoides f. typicus Kuckuck | 
| Authorship | Kuckuck | 
| Rank | Forma | 
| NomenclaturalStatus | NomInvalid | 
| Placed in | Ectocarpus confervoides Le Jolis | 
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Ectocarpus confervoides f. typicus Kuckuck | 
| Identification made in | [no date] (2) |