Ruschia indurata Ruschia indurata (L.Bolus) Schwantes in Z. Sukkulentenk. 2: 187. 1926 sec. Hartmann 20171≡Mesembryanthemum induratum L.Bolus in Ann. Bolus Herb. 3: 135. 1922 syn. sec. Hartmann 201711. Hartmann, H. E. K. 2017 – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: SpringerContent