Opuntia acaulis Ekman & Werderm. in Repert. Spec. Nov. Regni Veg. 29: 230. 1931 Opuntia acaulis Ekman & Werderm. in Repert. Spec. Nov. Regni Veg. 29: 230. 1931Taxon for this nameOpuntia acaulis Ekman & Werderm.