Mesembryanthemum impressum (L.Bolus) J.W.Ingram in Baileya 17: 50. 1970 Mesembryanthemum impressum (L.Bolus) J.W.Ingram in Baileya 17: 50. 1970is basionym for Ruschia impressa L.Bolus, Notes Mesembryanthemum 2: 159. 1929Taxon for this nameMesembryanthemum impressum (L.Bolus) J.W.Ingram