Hildmannia geissei (Poselg. ex K.Schum.) Kreuz. & Buining in Repert. Spec. Nov. Regni Veg. 50: 206. 1941
Hildmannia geissei in Repert. Spec. Nov. Regni Veg. 50: 206. 1941
is new combination for Echinocactus geissei, Gesamtbeschr. Kakt.: 406. 1897–1899