| Asteraceae | |
Bidens connata fo. ambiversa
| (Fassett) E.G. Voss | Michigan Bot. 34(4): 139 | 1995 [1996] |
| Asteraceae | |
Bidens connata var. ambiversa
| Fassett | Rhodora 30(350): 33–34, pl. 160, f. 6–7 | 1928 |
| Asteraceae | |
Bidens connata fo. anomala
| (Farw.) E.G. Voss | Michigan Bot. 34(4): 139 | 1995 [1996] |
| Asteraceae | |
Bidens connata var. anomala
| Farw. | Rep. (Annual) Commiss. Parks Boulevards Detroit 11: 91 | 1900 |
| Asteraceae | |
Bidens connata var. comosa
| A. Gray | Manual (ed. 5) 261 | 1867 |
| Asteraceae | |
Bidens connata var. connata
| | | |
| Asteraceae | |
Bidens connata var. fallax
| (Warnst.) Sherff | Bot. Gaz. 76(2): 154 | 1923 |
| Asteraceae | |
Bidens connata var. fultior
| Fernald & H. St. John | Rhodora 17(193): 24–25 | 1915 |
| Asteraceae | |
Bidens connata var. gracilipes
| Fernald | Rhodora 21(245): 103–104 | 1919 |
| Asteraceae | |
Bidens connata var. inundata
| Fernald | Rhodora 23(276): 298 | 1921 [1922] |
| Asteraceae | |
Bidens connata var. petiolata
| (Nutt.) Farw. | Rep. (Annual) Commiss. Parks Boulevards Detroit 11: 91 | 1900 |
| Asteraceae | |
Bidens connata var. pinnata
| S. Watson | Manual (ed. 6) 284 | 1890 |
| Asteraceae | |
Bidens connata var. saint-vincentii
| Sherff | Rhodora 67(769): 60–61 | 1965 |
| Asteraceae | |
Bidens connata var. submutica
| Fassett | Rhodora 35(420): 391 | 1933 |
| Asteraceae | ** |
Bidens connata var. typica
| Fassett | Rhodora 30(350): 31–32 | 1928 |