| Name | Cladophora gracilis f. elongata Collins |
| Authorship | Collins |
| Rank | Forma |
| NomenclaturalStatus | NomLeg |
| Placed in | Cladophora gracilis (Griffiths) Kützing |
| Remarks | Created from Taxon Name Import: Cladophora gracilis f. elongata Collins |
| Citation | Jul 1900 Phycoth. Bor.-Amer. Fasc. 15: no. 725 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Cladophora gracilis f. elongata Collins |
| Identification made in | [no date] (2) |