This is one of the night blooming ones that closes up all the blossoms during the day.
This is part of the Goldfield range. They run along the north side of Apache Junction, and yes, they did find gold there. There are several old mines in the area and one has been turned into a tourist attraction. All of the mines are played out now, but there are supposed to be places up near Four Peaks where you can still get "color" in a pan.
This morning on my bike ride I saw this silhouette of the southeast flank of the Superstitions and stopped to take a picture.
This shot is looking from the opening of the canyon southwest across the main lake. In the background you can just see the tip of Weaver's Needle, which is one of the major landmarks of the Superstition Mountains.