For Litrisa
Correa, M.D., and R.L. Wilbur. 1969. A revision of the genus Carphephorus (Compositae-Eupatoriae). J. Elisha Mitch. Sci. Soc. 85: 79-91.
Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C.
Nesom, G.L. 2006hh. Carphephorus. 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.
Schilling, E.E. 2011b. Hybrid genera in Liatrinae (Asteraceae: Eupatorieae). Molec. Phylogen. Syst. 59: 158-167.
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