Gymnocalycium gibbosum f. cerebriforme (Speg.) Papsch in Gymnocalycium 9: 201. 1996 Gymnocalycium gibbosum f. cerebriforme (Speg.) Papsch in Gymnocalycium 9: 201. 1996Taxon for this nameGymnocalycium gibbosum f. cerebriforme (Speg.) Papsch