| Name | Laurencia obtusa var. cartilaginea Ardissone |
| Authorship | Ardissone |
| Rank | Variety |
| Placed in | Laurencia obtusa (Hudson) J. V. Lamouroux |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Laurencia obtusa var. cartilaginea Ardissone |
| Identification made in | [no date] (2) |