Cereus ekmanii Werderm. in Repert. Spec. Nov. Regni Veg. 29: 235. 1931 Cereus ekmanii Werderm. in Repert. Spec. Nov. Regni Veg. 29: 235. 1931is basionym for Leptocereus ekmanii (Werderm.) F.M.Knuth, Kaktus-ABC: 302. 1936 ["1935"]Taxon for this nameCereus ekmanii Werderm.