Cephalophyllum rigidum L.Bolus in S. African Gard. 18: 156. 1928 Cephalophyllum rigidum L.Bolus in S. African Gard. 18: 156. 1928Taxon for this nameCephalophyllum rigidum L.Bolus in S. African Gard. 18: 156. 1928