References

For Polymnia

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

Estes, D., and J. Beck. 2011. A new species of Polymnia (Asteraceae: tribe Polymnieae) from Tennessee. Syst. Botany 36: 481-486. Google Scholar

Pittman, A.B., V. Bates, and R. Kral. 1989. A new species of Polymnia (Compositae: Heliantheae) from the Ouachita Mountain region of Arkansas. Sida 13: 481-486. Google Scholar

Strother, J.L. 2006ll. Polymnia. In Flora of North America Editorial Committee. 2006b. Flora of North America north of Mexico. Volume 20, Magnoliophyta: Asteridae, part 6: Asteraceae, part 2. Oxford Univ. Press, New York, NY. 666 pp. Google Scholar

Wells, J.R. 1965. A taxonomic study of Polymnia (Compositae). Brittonia 17: 144-159. Google Scholar