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Smith, G.F. 2023. A review of the infrageneric classifications proposed for Kalanchoe (Crassulaceae subfam. Kalanchooideae) from the earliest times up to 2000. Phytotaxa. 619, 1 (Oct. 2023), 1–38. DOI:https://doi.org/10.11646/phytotaxa.619.1.1.