Smith, G. F., & Figueiredo, E. (2020).

Kalanchoe ×gildenhuysii (Crassulaceae subfam. Kalanchooideae), a new nothospecies derived from K. millotii and K. tomentosa

. Phytotaxa, 442(1), 43–46. https://doi.org/10.11646/phytotaxa.442.1.8