| 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) |