SWANEPOEL, W.; MANZITTO-TRIPP, E. A. .; DEXTER, K. G.; VAN WYK, A. E. Petalidium etendekaense (Acanthaceae), a new species from Namibia, with notes on the taxonomic identity of P. glutinosum. Phytotaxa, Auckland, New Zealand, v. 636, n. 1, p. 35–47, 2024. DOI: 10.11646/phytotaxa.636.1.3. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.636.1.3. Acesso em: 6 dec. 2025.