References

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. Google Scholar

Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C. Google Scholar

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. Google Scholar

Schilling, E.E. 2011b. Hybrid genera in Liatrinae (Asteraceae: Eupatorieae). Molec. Phylogen. Syst. 59: 158-167. Google Scholar