For Ageratina
Clewell, A.F., and J.W. Wooten. 1971. A revision of Ageratina (Compositae: Eupatorieae) from eastern North America. Brittonia 23: 123-143.
Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C.
Lamont, E.E. 2018. Ageratina roanensis (Asteraceae), a new combination for an endemic species from the Southern Appalachian Mountains. Phytoneuron 2018-77: 1-3. Published 5 November 2018. ISSN 2153 733X
Nesom, G.L. 2006mm. Ageratina. 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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