Notocactus minimus var. tenuicylindricus (F.Ritter) Havlíček in Repert. Pl. Succ. 41: 11. 1990
Notocactus minimus var. tenuicylindricus in Repert. Pl. Succ. 41: 11. 1990
is new combination for Notocactus tenuicylindricus in Succulenta (Netherlands) 49: 108. 1970