Salywon, A.M. , Rebman, J.P. and Dierig, D.A. 2021. Additional documented chromosome number determinations in Paysonia (Brassicaceae). Journal of the Botanical Research Institute of Texas. 15, 2 (Dec. 2021), 575–577. DOI:https://doi.org/10.17348/jbrit.v15.i2.1163.