| Name | Cladophora gracilis f. subflexuosa Collins |
| Authorship | Collins |
| Rank | Forma |
| NomenclaturalStatus | Unknown |
| Placed in | Cladophora gracilis (Griffiths) Kützing |
| Remarks | Created from Taxon Name Import: Cladophora gracilis f. subflexuosa Collins |
| Citation | Nov. 1908 Phycoth. Bor.-Amer. Fasc. 31: no. 1530 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Cladophora gracilis f. subflexuosa Collins |
| Identification made in | [no date] (1), 1946 (2) |