Figueiredo, Estrela, Gideon F. Smith, and Jorge Paiva. “A Checklist of Polygala (Polygalaceae) in the Flora of Southern Africa Region With Notes on Types ”. Phytotaxa 155, no. 1 (December 19, 2013): 1–22. Accessed February 5, 2026. https://phytotaxa.mapress.com/pt/article/view/phytotaxa.155.1.1.