Swanepoel, Wessel, and Abraham E. Van Wyk. “Petalidium bembeense (Acanthaceae), a New Species from Angola and Namibia”. Phytotaxa 762, no. 1 (June 12, 2026): 85–97. Accessed June 13, 2026. https://phytotaxa.mapress.com/pt/article/view/phytotaxa.762.1.7.