"They are the root parasite Orobanche cooperi, with the English name Burro-weed Strangler or Desert Broomrape. (What a nasty name)
To my knowledge, all of the members of the Orobanchaceae family can be root parasites. Recently plants in the genus Castilleja (paintbrushes and owl clovers) were added to this family. Orobanche cooperi which has no chlorophyll is considered an obligate parasite because it cannot complete its life cycle without a host plant.
Common host plants for this plant are in the Sunflower Family especially the Ambrosia genus (such as Canyon Ragweed, Triangleleaf Bursage, and Burro Brush in Sabino) and Encelia (Brittlebush). These Orabanche plants were all somewhat near to Brittlebushes and thus is host plant for those in the photos."