The Colorado hookless cactus (Sclerocactus glaucus) has been protected under the Endangered Species Act since October 11, 1979, as part of the Uintah hookless cactus complex. On September 15, 2009, the U.S Fish and Wildlife Service officially recognized the taxonomic split of this species complex into three distinct species: S. brevispinus (Pariette cactus), S. glaucus (Colorado hookless cactus), and S. wetlandicus (Uinta Basin hookless cactus). Since the date of this taxonomic split, there have been few scientific publications specific to the Colorado hookless cactus. I prepared an annotated bibliography for S. glaucus because limited specific scientific information is available. Citations include information on the legal status, description, distribution, habitat, adaptation, management and monitoring, pests and problems, and seeds and plant production of S. glaucus and other closely-related cactus species.
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