Verbatim text: Strother, J. L. and G. E. Pilz. 1975. Taxonomy of Psathyrotes (Compositae: Senecioneae). Madroño 23: 24–40.
Author: Strother, J.L., Pilz, G.E.
Year: 1975
Title: Taxonomy of Psathyrotes (Compositae: Senecioneae)
Journal: Madroño
Volume: 23
Pages: 24–40