Sclerocactus whipplei
Sclerocactus whipplei, or Whipple's fishhook cactus, is a cactus found in the Colorado Plateau and Canyonlands region of the southwestern United States.
The cactus was named in honor of Lieut. Amiel Weeks Whipple the military engineer/surveyor, who led boundary survey team that identified the cactus specimen.