Ermakova , Anna, Carolyn V. Whiting, Keeper Trout, Colin Clubbe, Martin K. Terry, and Norma Fowler. “A”. Journal of the Botanical Research Institute of Texas 15, no. 1 (July 23, 2021): 149–160. Accessed April 25, 2024. https://journals.brit.org/jbrit/article/view/1057.