This Opuntia polyacantha plant comes from White mountains in California. All California polyacanthas have same yellow flower. This particular form grows in the valleys of Eastern slope of Sierra Nevada range, and in White mountains across the Owens valley where it is found as high as 13000ft /4000m.
This is a frost hardy plant that does not grow at elevations where there is no winter snowfall. It is easy in cultivation, but to see flowers lots of sun and very early season watering is required. Growing from seed is easy, once you germinate them.