Verbatim text: Roalson, E. H. and K. W. Allred. 1998. A clarification of Centaurea americana and Centaurea rothrockii (Compositae: Cardueae). New Mexico Botanist 7: 3–5.
Author: Roalson, E.H., Allred, K.W.
Year: 1998
Title: A clarification of Centaurea americana and Centaurea rothrockii (Compositae: Cardueae)
Journal: New Mexico Botanist
Volume: 7
Pages: 3–5