Kalanchoe is a fairly large genus, the classification of which is still in a state of flux. The major point of contention is whether the Bryophyllum should be lumped within Kalanchoe. Following Descoings (2003), they remain joined here, as they normally have been since 1907. Also, more knowledge of individual species is required and will probably result in taxonomic changes within the genus. The genus is not as popular as it once was, but some species, such as Kalanchoe blossfeldiana, are still extremely popular and common in cultivation.