Verbatim text: Keil, D. J. 1975. Revision of Pectis sect. Heteropectis (Compositae: Tageteae). Madroño 23: 181–191.
Author: Keil, D.J.
Year: 1975
Title: Revision of Pectis sect. Heteropectis (Compositae: Tageteae)
Journal: Madroño
Volume: 23
Pages: 181–191