References
For Verbascum
Fischer. 2004. In Kadereit, J.W. 2004. The families and genera of vascular plants. VII. Flowering plants – Dicotyledons – Lamiales (except Acanthaceae including Avicenniaceae). Springer, Berlin. 478 pp. Google Scholar
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Pennell, F.W. 1935. The Scrophulariaceae of eastern temperate North America. Academy of Natural Sciences of Philadelphia Monograph No. 1. Google Scholar
Schmidt, R.J. 2023. Contributions to the weedy and non-native flora of New Jersey. In Weakley, A.S., J.C. Kees, B.A. Sorrie, S.G. Ward, D.B. Poindexter, M. Brock, L.D. Estes, E.L. Bridges, S.L. Orzell, G.A. Levin, R.K.S. McClelland, R.J. Schmidt, and S.A. Namestnik. 2023. Studies in the vascular flora of the southeastern United States. IX. J. Bot. Res. Inst. Texas 17(1): 191-257. Google Scholar