| Aristolochiaceae | |
Aristolochia serpentaria var. bartonii
| (Klotzsch) Duch. | Prodr. 15(1): 433–434 | 1864 |
| Aristolochiaceae | |
Aristolochia serpentaria var. hastata
| Duch. | Prodr. 15(1): 434 | 1864 |
| Aristolochiaceae | |
Aristolochia serpentaria var. hastata
| (Nutt.) Alph. Wood | Class-book Bot. ed. 2b: 602 | 1861 |
| Aristolochiaceae | |
Aristolochia serpentaria var. laxa
| Duch. | Prodr. 15(1): 434 | 1864 |
| Aristolochiaceae | * |
Aristolochia serpentaria var. nashii
| (Kearney) H.E. Ahles | J. Elisha Mitchell Sci. Soc. 75: 130 | 1959 |
| Aristolochiaceae | |
Aristolochia serpentaria var. serpentaria
| | | |