Felker, Peter, R. Zapata, X. Wang, Diego Medina, Ronald Bunch, and Andrew Paterson. “Fruit Characters Among Apomicts and Sexual Progeny of a Cross of the Texas Native Opuntia Lindheimerii (1250) With a Commercial Fruit Type Opuntia ficus–indica (1281)”. Journal of the Professional Association for Cactus Development 12 (December 21, 2009): 48–66. Accessed October 16, 2025. https://www.jpacd.org/jpacd/article/view/97.