| Name | Gelidium amansii f. elatum Okamura |
| Authorship | Okamura |
| Rank | Forma |
| Placed in | Gelidium amansii (J. V. Lamouroux) J. V. Lamouroux |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Gelidium amansii f. elatum Okamura |
| Identification made in | [no date] (4) |