Smith, G.F. (2022)

Kalanchoe ×robertsonii [K. longiflora × K. rotundifolia] (Crassulaceae subfam. Kalanchooideae), a new, small-growing nothospecies from South Africa

. Phytotaxa 561 (1): 85–94. https://doi.org/10.11646/phytotaxa.561.1.8