Verbatim text: Clewell, A. F. and J. W. Wooten. 1971. A revision of Ageratina (Compositae: Eupatorieae) from eastern North America. Brittonia 23: 123–143
Author: Clewell, A.F., Wooten, J.W.
Year: 1971
Title: A revision of Ageratina (Compositae: Eupatorieae) from eastern North America
Journal: Brittonia
Volume: 23
Pages: 123–143