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National Collection Spotlight: Colorado Hookless Cactus (Sclerocactus glaucus)

Image of Colorado Hookless Cactus (Sclerocactus glaucus) - available for sponsorship.
Colorado Hookless Cactus (Sclerocactus glaucus).

 

The Colorado hookless cactus (Sclerocactus glaucus) can be difficult to find in the river alluvium habitat it calls home in western Colorado and eastern Utah; the perennial stem can be inconspicuous in the coarse gravel – and even shrink below the ground during large stretches of the year – making these plants difficult to spot and identify when not in bloom. Fortunately, this federally threatened cactus produces striking pink flowers which bloom from April to May.

Nearly all populations are threatened with habitat destruction or modification from energy extraction developments, water storage projects, transportation, and residential facilities. Other ongoing threats include impacts from moss-rock and rip-rap collecting operations, illegal plant collection, and damage from recreational use or livestock trampling. Denver Botanic Gardens maintains a seed collection and has established macroplots of Colorado Hookless cactus populations to monitor demographic trends as part of its conservation efforts to save this species from extinction.

Learn more about the Colorado hookless cactus on its National Collection Plant Profile and support its conservation with a Plant Sponsorship.

  • Image of habitat of Sclerocactus glaucus. Photo Credit: Jennifer Ramp Neale
    Habitat of Sclerocactus glaucus. Photo Credit: Jennifer Ramp Neale
  • Closeup of Sclerocactus glaucus in bud. Photo Credit: Scott Dressel-Martin
    Sclerocactus glaucus in bud. Photo Credit: Scott Dressel-Martin
  • DBG research team in the field near De Beque, Colorado for Sclerocactus glaucus
    The Denver Botanic Garden's research team takes care in monitoring Colorado hookless cactus, a CPC National Collection species.

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The Center For Plant Conservation (CPC) is a 501 (c) (3) non-profit organization (EIN# 22-2527116) dedicated to saving rare plant species from extinction. CPC's National Collection represents more than 2,000 of the world's rarest plants, maintained collectively by its valued network of Participating Institutions.

Center for Plant Conservation National Headquarters 15600 San Pasqual Valley Rd. Escondido, CA 92027-7000

Email: info@saveplants.org; Phone: (760) 796-5686

The CPC National Office is headquartered at the San Diego Zoo Safari Park in Escondidio, California, in partnership with the San Diego Zoo Wildlife Alliance, a CPC Participating Institution.

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