Didymaotus lapidiformis Didymaotus lapidiformis (Marloth) N.E.Br. in Gard. Chron., ser. 3, 80: 149. 1926 sec. Hartmann 20171≡Mesembryanthemum lapidiforme Marloth in Trans. Roy. Soc. South Africa 4: 137. 1914 syn. sec. Hartmann 201711. Hartmann, H. E. K. 2017 – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: SpringerContent