Quedensley, Taylor S., Michael Gruenstaeudl, and Robert K. Jansen. “Phylogenetic Relationships of the Mexican Tussilaginoid Genera (Asteraceae: Senecioneae)”. Journal of the Botanical Research Institute of Texas 12, no. 2 (November 20, 2018): 481–498. Accessed April 20, 2024. https://journals.brit.org/jbrit/article/view/951.