| Name | Gelidium cartilagineum var. robustum N. L. Gardner |
| Authorship | N. L. Gardner |
| Rank | Variety |
| Placed in | Gelidium cartilagineum (Linnaeus) Gaillon |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Gelidium cartilagineum var. robustum N. L. Gardner |
| Identification made in | [no date] (1) |