Hymenocyclus crassus L.Bolus, Notes Mesembryanthemum 2: 363. 1932 Hymenocyclus crassus L.Bolus, Notes Mesembryanthemum 2: 363. 1932is basionym for Malephora crassa (L.Bolus) H.Jacobsen & Schwantes in Natl. Cact. Succ. J. 13: 77. 1958Taxon for this nameHymenocyclus crassus L.Bolus