Smith, G. F., Klopper, R. R., Crouch, N. R., & Figueiredo, E. (2021). Reinstatement of Aloe davyana var. subolifera (Asphodelaceae subfam. Alooideae), a distinctive variety of an endemic South African aloe. Phytotaxa, 482(2), 208–212. https://doi.org/10.11646/phytotaxa.482.2.9