Struwig, M., Siebert, S. and Jordaan, A. (2013) “Pollen morphology of members of southern African Boerhavia and Commicarpus (Nyctaginaceae)”, African Biodiversity & Conservation, 43(1). Available at: https://www.abcjournal.org/index.php/abc/article/view/203 (Accessed: 4 June 2026).