Verbatim text: Binns, S. E., B. R. Baum, and J. T. Arnason. 2002. A taxonomic revision of Echinacea (Asteraceae: Heliantheae). Syst. Bot. 27: 610–632.
Author: Binns, S.E., Baum, B.R., Arnason, J.T.
Year: 2002
Title: A taxonomic revision of Echinacea (Asteraceae: Heliantheae)
Journal: Syst. Bot
Volume: 27
Pages: 610–632