| Name | Galium serpenticum subsp. wenatchicum Dempster & Ehrendorfer |
| Authorship | Dempster & Ehrendorfer |
| Rank | Subspecies |
| Placed in | Galium serpenticum Dempster |
| Citation | 1965 Brittonia 17(4): 323, f. 4D, 5 [maps] |
| Holdings | 9 Specimens held in the Harvard University Herbaria identified as Galium serpenticum subsp. wenatchicum Dempster & Ehrendorfer |
| Identification made in | [no date] (9) |