Opuntia fragilis (Nutt.) Haw.
A widespread species, found throughout the western United States and as far northeast as Michigan.
Plant habit near Pool Creek, Dinosaur National Monument, Moffat County, Colorado, 18 Jun 2008.
A flower near Pool Creek, Dinosaur National Monument, 18 Jun 2008.
A pad near Pool Creek, Dinosaur National Monument, 18 Jun 2008.
A flower seen from above, complete with orgy of small beetles, Dinosaur National Monument, 18 Jun 2008.
Another flower near Pool Creek in Dinosaur National Monument, 27 Apr 2008.