Synonyms
Caralluma kalaharica Nel
Orbeopsis knobelii (E.Phillips) L.C.Leach
Stapelia knobelii E.Phillips
Caralluma knobelii var. langii (A.C.White & B.Sloane) A.C.White & B.Sloane
Ceropegia knobelii (E.Phillips) Bruyns
Caralluma langii A.C.White & B.Sloane
Caralluma knobelii (E.Phillips) E.Phillips