[1]
Swanepoel, W., Becker, R.W. and Wyk, A.E.V. 2025. Petalidium engoense (Acanthaceae), a new species from Angola and Namibia, with notes on phenotypic plasticity in the genus. Phytotaxa. 734, 1 (Dec. 2025), 9–19. DOI:https://doi.org/10.11646/phytotaxa.734.1.2.