| Scrophulariaceae | |
Scrophularia nodosa var. americana
| Michx. | Fl. Bor.-Amer. 2: 21 | 1803 |
| Scrophulariaceae | |
Scrophularia nodosa var. californica
| (Cham. & Schltdl.) M.E. Jones | Contr. W. Bot. 12: 67 | 1908 |
| Scrophulariaceae | |
Scrophularia nodosa var. lanceolata
| (Pursh) M.E. Jones | Contr. W. Bot. 12: 67 | 1908 |
| Scrophulariaceae | |
Scrophularia nodosa var. marilandica
| (L.) A. Gray | Syn. Fl. N. Amer. 2(1): 258 | 1878 |
| Scrophulariaceae | |
Scrophularia nodosa var. montana
| Stiefelh. | Bot. Jahrb. Syst. 44: 462 | 1910 |
| Scrophulariaceae | |
Scrophularia nodosa var. nodosa
| | | |
| Scrophulariaceae | |
Scrophularia nodosa var. occidentalis
| Rydb. | Contr. U.S. Natl. Herb. 3(8): 517 | 1896 |