Close-up of a columnar cactus in a private garden in Phoenix, Arizona. © Rob Huntley
Desert habitat photo of a Mammillaria species (pin-cushion cactus) in Arizona. Possibly Mammillaria grahamii. © Rob Huntley
Desert habitat photo of an Mammillaria species (pin-cushion cactus) in Arizona. Possibly Mammillaria grahamii. © Rob Huntley
