Verbatim text: Peterson, K. M. and W. W. Payne. 1973. The genus Hymenoclea (Compositae: Ambrosieae). Brittonia 25: 243–256.
Author: Peterson, K.M., Payne, W.W.
Year: 1973
Title: The genus Hymenoclea (Compositae: Ambrosieae)
Journal: Brittonia
Volume: 25
Pages: 243–256