Synonyms: Cactus nobilis; Cactus reductus (homotypic); Cereus reductus; Echinocactus gibbosus f. leucodictyus; Echinocactus gibbosus nobilis; Echinocactus gibbosus var. leucodictyus; Echinocactus gibbosus var. nobilis; Echinocactus gibbosus var. ventanicola; Echinocactus gibbosus ventanicola; Echinocactus leeanus (homotypic); Echinocactus mackieanus; Gymnocalycium gibbosum nobile; Gymnocalycium hyptiacanthum leeanum; Gymnocalycium leeanum (homotypic); Gymnocalycium mackieanum; Gymnocalycium platense var. ventanicola; Gymnocalycium reductum leeanum; Gymnocalycium reductum sibalii; Gymnocalycium reductum var. leeanum (homotypic); Gymnocalycium reductum var. leucodictyon; Gymnocalycium reductum var. schatzlianum; Gymnocalycium schatzlianum; Gymnocalycium sibalii