| Name | Laurencia obtusa var. laxa (R. Brown ter ex Turner) Ardissone |
| Authorship | (R. Brown ter ex Turner) Ardissone |
| Rank | Variety |
| Placed in | Laurencia obtusa (Hudson) J. V. Lamouroux |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Laurencia obtusa var. laxa (R. Brown ter ex Turner) Ardissone |
| Identification made in | [no date] (1) |