Desert in bloom

A couple of weeks ago, I was housesitting in a place on the far east side of town. While I was there, every cactus on the property burst into bloom, and the desert was a riot of bees and color. I'm not sure what kind of cactus this is, but I think it's related to the cereus. It's a fat, ground crawling variety that puts out enormous, colorful blooms. These flowers are as big across as a large human hand - wrist to the tip of your fingers. This particular cactus is in a shallow depression in the shade of a mesquite tree. It was a breezy day, so the petals were fluttering and the shadows were dancing across the face of the flower. Perfect conditions for taking a photo tour of the property!