Salywon, A. M. ., J. P. . Rebman, and D. A. . Dierig. “Additional Documented Chromosome Number Determinations in Paysonia (Brassicaceae)”. Journal of the Botanical Research Institute of Texas, vol. 15, no. 2, Dec. 2021, pp. 575-7, doi:10.17348/jbrit.v15.i2.1163.