Verbatim text: Semple, J. C., J. G. Chmielewski, and C. Leeder. 1991. A multivariate morphometric study and revision of Aster subg. Doellingeria sect. Triplopappus (Compositae: Astereae): The Aster umbellatus complex. Canad. J. Bot. 69: 256–276.
Author: Semple, J.C., Chmielewski, J.G., Leeder, C.
Year: 1991
Title: A multivariate morphometric study and revision of Aster subg. Doellingeria sect. Triplopappus (Compositae: Astereae): The Aster umbellatus complex
Journal: Canad. J. Bot
Volume: 69
Pages: 256–276