Notocactus ottonis var. stenogonus Backeb., Cactaceae 6: 3758. 1962
Notocactus ottonis var. stenogonus, Cactaceae 6: 3758. 1962
is basionym for Notocactus neo-ottoianus var. stenogonus, Cactaceae: 440. 1981
Notocactus ottonis var. stenogonus, Cactaceae 6: 3758. 1962
Taxon for this name