For Verbesina
Coleman, J.R. 1966. A taxonomic revision of section Ximenesia of the genus Verbesina (Compositae). Amer. Midl. Naturalist 76: 475-481.
Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C.
Olsen, J. 1979. Taxonomy of the Verbesina virginica complex (Asteraceae). Sida 8: 128-134.
Strother, J.L. 2006oo. Verbesina. In Flora of North America Editorial Committee. 2006c. Flora of North America north of Mexico. Volume 21, Magnoliophyta: Asteridae, part 6: Asteraceae, part 3. Oxford Univ. Press, New York, NY. 616 pp.
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