Ruschia impressa Ruschia impressa L.Bolus, Notes Mesembryanthemum 2: 159. 1929 sec. Hartmann 20171≡Mesembryanthemum impressum (L.Bolus) J.W.Ingram in Baileya 17: 50. 1970 syn. sec. Hartmann 201711. Hartmann, H. E. K. 2017 – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: SpringerContent