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The sunflower taxa used in this study. (A) Phylogenetic relationships based on Stephens et al. (2015) and Baute et al. (2016). (B) H. niveus ssp. tephrodes. (C) H. petiolaris ssp. petiolaris. (D) H. petiolaris ssp. fallax. (E) H. argophyllus. (F) H. annuus. Photo credits: Brook Moyers (B, C, E, and F) and Rose Andrew (D).
