For Vernonia
Faust, W.Z. 1972. A biosystematic study of the Interiores species group of the genus Vernonia (Compositae). Brittonia 24: 363-378. Google Scholar
Jones, S.B., Jr. 1982. The genera of Vernonieae (Compositae) in the southeastern United States. J. Arnold Arb. 63: 489-507. Google Scholar
Jones. 1980. In Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C. Google Scholar
Siniscalchi, C.M., B. Loeuille, V.A. Funk, J.R. Mandel, and J.R. Pirani. 2019. Phylogenomics yields new insight Into relationships within Vernonieae (Asteraceae). Frontiers in Plant Science 10: 1224. Google Scholar
Strother, J.L. 2006l. Vernonia. In Flora of North America Editorial Committee. 2006a. Flora of North America north of Mexico. Volume 19, Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford Univ. Press, New York, NY. 579 pp. Google Scholar
Urbatsch, L.E. 1972. Systematic study of the Altissimae and Giganteae species groups of the genus Vernonia (Compositae). Brittonia 24: 229-238. Google Scholar
Ward, D.B. 2012a. New combinations in the Florida flora III. Phytologia 94: 459-485. Google Scholar