| Name | Thesium squarrosum Linnaeus f. |
| Authorship | Linnaeus f. |
| Rank | Species |
| Placed in | Thesium |
| Citation | 1782 Suppl. Pl. 162 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Thesium squarrosum Linnaeus f. |
| Identification made in | [no date] (5) |