LeBlond, Richard J., Robert F. C. Naczi, Alan S. Weakley, Kathleen S. Walz, Robert W. Freckmann, and William McAvoy. ā€œSā€. Journal of the Botanical Research Institute of Texas 11, no. 2 (November 29, 2017): 413ā€“417. Accessed November 23, 2024. https://journals.brit.org/jbrit/article/view/1079.