Smith, G. F., and N. R. Crouch. “Kalanchoe steyniae (Crassulaceae Subfam. Kalanchooideae; K. [subg. Kalanchoe Sect. Raveta] Ser. Rotundifoliae), a New, Small-Growing, Shrubby Species from Eastern Southern Africa”. Phytotaxa, vol. 659, no. 3, July 2024, pp. 268-76, doi:10.11646/phytotaxa.659.3.4.