Weakley, Alan S., Derick B. Poindexter, Hannah C. Medford, Bruce A. Sorrie, Carol Ann McCormick, Edwin L. Bridges, Steve L. Orzell, Keith A. Bradley, Harvey E. Ballard, Jr., Remington N. Burwell, Samuel L. Lockhart, and Alan R. Franck. “Studies in the Vascular Flora of the Southeastern United States. VI”. Journal of the Botanical Research Institute of Texas 14, no. 2 (December 7, 2020): 199-239. Accessed September 28, 2021. https://journals.brit.org/jbrit/article/view/1004.