Verbatim text: Semple, J. C. 1977. Cytotaxonomy of Chrysopsis and Heterotheca (Compositae–Astereae): A new interpretation of phylogeny. Canad. J. Bot. 55: 2503–2513.
Author: Semple, J.C.
Year: 1977
Title: Cytotaxonomy of Chrysopsis and Heterotheca (Compositae–Astereae): A new interpretation of phylogeny
Journal: Canad. J. Bot
Volume: 55
Pages: 2503–2513