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Notes on Kalanchoe subg. Bryophyllum (Crassulaceae subfam. Kalanchooideae) and the kalanchoes of Sijfert H. Koorders (1919)

. Phytotaxa. 549, 1 (Jun. 2022), 87–96. DOI:https://doi.org/10.11646/phytotaxa.549.1.7.