Smith, G.F. (2020)

Kalanchoe ×hankeyi [= K. longiflora × K. sexangularis] (Crassulaceae subfam. Kalanchooideae), a new nothospecies from South Africa

. Phytotaxa 451 (1): 93–96. https://doi.org/10.11646/phytotaxa.451.1.9