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Clarifying the typification of the names Kalanchoe fedtschenkoi and K. waldheimii (Crassulaceae subfam. Kalanchooideae), two leaf-succulent shrubs indigenous to Madagascar

. Phytotaxa. 509, 1 (Jun. 2021), 131–134. DOI:https://doi.org/10.11646/phytotaxa.509.1.9.