Verbatim text: Semple, J. C., V. Blok, and P. Heiman. 1980. Morphological, anatomical, habit and habitat differences among the goldenaster genera Chrysopsis, Heterotheca and Pityopsis (Compositae–Astereae). Canad. J. Bot. 58: 164–171.
Author: Semple, J.C., Blok, V., Heiman, P.
Year: 1980
Title: Morphological, anatomical, habit and habitat differences among the goldenaster genera Chrysopsis, Heterotheca and Pityopsis (Compositae–Astereae)
Journal: Canad. J. Bot
Volume: 58
Pages: 164–171