Smith, G.F. & Figueiredo, E. (2019)

Kalanchoe porphyrocalyx var. sambiranensis, a new variety in a Madagascan Kalanchoe (Crassulaceae subfam. Kalanchooideae)

 

. Phytotaxa 422 (2): 206–208. https://doi.org/10.11646/phytotaxa.422.2.8