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Kalanchoe ×leistneri (K. sexangularis × K. winteri) (Crassulaceae subfam. Kalanchooideae), a new southern African nothospecies

. Phytotaxa. 509, 2 (Jun. 2021), 248–254. DOI:https://doi.org/10.11646/phytotaxa.509.2.8.