| Rubiaceae | |
Galium trifidum var. brevipedunculatum
| Regel | Tent. Fl. Ussur. 77 | 1861 |
| Rubiaceae | |
Galium trifidum subsp. brevipes
| (Fernald & Wiegand) Á. Löve & D. Löve | Taxon 31(2): 352 | 1982 |
| Rubiaceae | |
Galium trifidum subsp. columbianum
| (Rydb.) Hultén | Fl. Aleut. Isl. 307 | 1937 |
| Rubiaceae | |
Galium trifidum subsp. distentum
| Printz | Veg. Siber.-Mongol. Front. 400 | 1921 |
| Rubiaceae | |
Galium trifidum var. europaeum
| Rupr. | Beitr. Pflanzenk. Russ. Reiches 38 | 1846 |
| Rubiaceae | |
Galium trifidum fo. halophilum
| (Fernald & Wiegand) B. Boivin | Naturaliste Canad. 93(4): 433 | 1966 |
| Rubiaceae | |
Galium trifidum subsp. halophilum
| (Fernald & Wiegand) Puff | Canad. J. Bot. 54(16): 122 | 1976 |
| Rubiaceae | |
Galium trifidum var. halophilum
| Fernald & Wiegand | Rhodora 12(136): 78 | 1910 |
| Rubiaceae | |
Galium trifidum var. latifolium
| Torr. | Fl. N. Middle United States 1: 165 | 1824 |
| Rubiaceae | |
Galium trifidum var. modestum
| (Diels) Cufod. | Oesterr. Bot. Z. 89: 233 | 1940 |
| Rubiaceae | |
Galium trifidum subsp. pacificum
| (Wiegand) Piper & Beattie | Fl. N.W. Coast 336 | 1915 |
| Rubiaceae | |
Galium trifidum var. pacificum
| Wiegand | Bull. Torrey Bot. Club 24(8): 400 | 1897 |
| Rubiaceae | |
Galium trifidum var. pusillum
| A. Gray | Manual (ed. 5) 208 | 1867 |
| Rubiaceae | |
Galium trifidum subsp. subbiflorum
| (Wiegand) Puff | Canad. J. Bot. 54(16): 1919 | 1976 |
| Rubiaceae | |
Galium trifidum var. subbiflorum
| Wiegand | Bull. Torrey Bot. Club 24(8): 399–400 | 1897 |
| Rubiaceae | |
Galium trifidum subsp. tinctorium
| (L.) H. Hara | Rhodora 41(489): 388 | 1939 |
| Rubiaceae | |
Galium trifidum var. tinctorium
| (L.) Torr. & A. Gray | Fl. N. Amer. 2(1): 22 | 1841 |
| Rubiaceae | |
Galium trifidum subsp. trifidum
| | | |
| Rubiaceae | |
Galium trifidum var. trifidum
| | | |
| Rubiaceae | ** |
Galium trifidum subsp. typicum
| R.T. Clausen | Cornell Univ. Agric. Exp. Sta. Mem. 291: 9 | 1949 |