Neowerdermannia vorwerkii var. erectispina Hoffm. & Backeb. in Backeberg, Cactaceae 3: 1796. 1959
Neowerdermannia vorwerkii var. erectispina in Backeberg, Cactaceae 3: 1796. 1959
is basionym for Weingartia vorwerkii var. erectispina, Descr. Cact. Nov. 3: 16. 1963