Malephora crassa Malephora crassa (L.Bolus) H.Jacobsen & Schwantes in Natl. Cact. Succ. J. 13: 77. 1958 sec. Hartmann 20171≡Hymenocyclus crassus L.Bolus, Notes Mesembryanthemum 2: 363. 1932 syn. sec. Hartmann 201711. Hartmann, H. E. K. 2017 – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: SpringerContent