Delosperma crassum Delosperma crassum L.Bolus, Notes Mesembryanthemum 2: 169. 1930 sec. Hartmann 20171≡Drosanthemum robustum L.Bolus, Notes Mesembryanthemum 2: 10. 1928 syn. sec. Hartmann 201711. Hartmann, H. E. K. 2017 – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: SpringerContent