Taxonomic Change of Sclerocactus Glaucus to Three Separate Species

We, the U.S. Fish and Wildlife Service (Service), announce the revised taxonomy of Sclerocactus glaucus (Uinta Basin hookless cactus) under the Endangered Species Act of 1973, as amended (Act). We determine that S. glaucus (previously considered a complex), which is currently listed as a threatened species, is actually three distinct species: S. brevispinus, S. glaucus, and S. wetlandicus. We are revising the List of Endangered and Threatened Plants to reflect the scientifically accepted taxonomy and nomenclature of these species. In addition, we revise the common names for these species as follows: S. brevispinus (Pariette cactus), S. glaucus (Colorado hookless cactus), and S. wetlandicus (Uinta Basin hookless cactus). These three species will continue to be listed as threatened with no regulatory changes.