MAGEE, A. R.; BOATWRIGHT, J. S.; MUCINA, L. Four new species of <em>Ursinia</em> (Asteraceae, Anthemideae) from South Africa, with an updated key to the genus in Namaqualand. Phytotaxa, [S. l.], v. 177, n. 3, p. 137–145, 2014. DOI: 10.11646/phytotaxa.177.3.1. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.177.3.1. Acesso em: 19 mar. 2025.