| Name | Galium munzii subsp. ambivalens Dempster & Ehrendorfer |
| Authorship | Dempster & Ehrendorfer |
| Rank | Subspecies |
| Placed in | Galium munzii Hilend & J. T. Howell |
| Citation | 1965 Brittonia 17(4): 309–310, f. 4C [map]. |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Galium munzii subsp. ambivalens Dempster & Ehrendorfer |
| Identification made in | 1962 (1) |