Smith, G.F. & Crouch, N.R. (2021) Crassula ×mortii (Crassulaceae subfam. Crassuloideae), a new natural hybrid between C. perforata and C. rubricaulis from South Africa’s southern Cape. Phytotaxa 487 (1): 97–102. https://doi.org/10.11646/phytotaxa.487.1.9