| Name | Galium serpenticum subsp. warnerense Dempster & Ehrendorfer |
| Authorship | Dempster & Ehrendorfer |
| Rank | Subspecies |
| Placed in | Galium serpenticum Dempster |
| Citation | 1965 Brittonia 17(4): 325, f. 4D, 6 [maps] |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Galium serpenticum subsp. warnerense Dempster & Ehrendorfer |
| Identification made in | [no date] (1) |
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