Goldblatt, Peter, and John C. Manning. 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). https://mail.abcjournal.org/index.php/abc/article/view/161.