Smith, G.F. (2022)

Kalanchoe ×trageri, at last a name for K. blossfeldiana × K. pumila (Crassulaceae subfam. Kalanchooideae), a horticulturally successful nothospecies

. Phytotaxa 550 (1): 45–58. https://doi.org/10.11646/phytotaxa.550.1.3