Drosanthemum opacum L.Bolus, Notes Mesembryanthemum 2: 182. 1930 Drosanthemum opacum L.Bolus, Notes Mesembryanthemum 2: 182. 1930Taxon for this nameDrosanthemum opacum L.Bolus, Notes Mesembryanthemum 2: 182. 1930