Gymnocactus beguinii var. smithii (Muehlenpf.) Backeb., Cactaceae 5: 2855. 1961 Gymnocactus beguinii var. smithii (Muehlenpf.) Backeb., Cactaceae 5: 2855. 1961is new combination for Echinocactus smithii Muehlenpf. in Allg. Gartenzeitung 14: 370. 1846Taxon for this nameGymnocactus beguinii var. smithii (Muehlenpf.) Backeb.