Smith, G.F. 2026. Infrageneric nothotaxa recognised in Kalanchoe (Crassulaceae [subfam. Cotyledonoideae] tr. Kalanchoeae): new names published at the ranks of nothosubgenus, nothosection, and nothoseries. Phytotaxa. 781, 2 (Oct. 2026), 137–150. DOI:https://doi.org/10.11646/phytotaxa.781.2.4.