Klopper, R.R., Grace, O.M., Klopper, A.W., Smith, G.F. & Wyk, A.E.V. (2023) A taxonomic revision of Aloe sect. Purpurascentes (Asphodelaceae subfam. Alooideae). Phytotaxa 628 (1): 1–64. https://doi.org/10.11646/phytotaxa.628.1.1