Smith, G.F. (2022)

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

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