Final rule · 2025-09692

Endangered and Threatened Wildlife and Plants; Removal of Colorado Hookless Cactus From the List of Endangered and Threatened Plants

We, the U.S. Fish and Wildlife Service (Service), are removing Colorado hookless cactus (Sclerocactus glaucus) from the Federal List of Endangered and Threatened Plants. Recent taxonomic studies have indicated that the currently listed entity is actually two species: Sclerocactus glaucus and Sclerocactus dawsoniae (previously identified as S. dawsonii in the proposed rule). When we use the common name "Colorado hookless cactus" or refer to "the species" in this final rule, we are referring to information or conclusions regarding both species (S. glaucus and S. dawsoniae) as the currently listed entity. When we are referring to information or analysis pertaining to one species, we will use the new scientific names of S. glaucus or S. dawsoniae. After a review of the best available scientific and commercial information, we find that delisting Colorado hookless cactus is warranted. Our review indicates that the threats to the Colorado hookless cactus have been eliminated or reduced to the point that the species no longer meets the definition of an endangered or threatened species under the Endangered Species Act of 1973, as amended (Act). Accordingly, the prohibitions and conservation measures provided by the Act, particularly through sections 4 and 7, will no longer apply to the Colorado hookless cactus.