| Name | Galium uncinulatum var. obstipum (Schlechtendal) S. Watson |
| Authorship | (Schlechtendal) S. Watson |
| Rank | Variety |
| Placed in | Galium uncinulatum de Candolle |
| Citation | 1883 Proc. Amer. Acad. Arts 18: 94 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Galium uncinulatum var. obstipum (Schlechtendal) S. Watson |
| Identification made in | [no date] (1) |