Smith, G. F., & Shtein, R. (2020). Kalanchoe ×edwardii (Crassulaceae subfam. Kalanchooideae), a nothospecies derived from K. beharensis and K. tomentosa. Phytotaxa, 475(2), 117–124. https://doi.org/10.11646/phytotaxa.475.2.6