Goldblatt, P. and Manning, J.C. (2015) “Two new subspecies of Dietes (Iridaceae: Iridoideae), Dietes iridioides subsp. angolensis from Angola and Dietes bicolor subsp. armeniaca from eastern South Africa, with notes and range extensions for Dietes butcheriana and Dietes iridioides”, African Biodiversity & Conservation, 45(1). Available at: https://mail.abcjournal.org/index.php/abc/article/view/161 (Accessed: 2 May 2026).