This is a Stag Horn cactus, getting ready to bloom

 These are Saugaro cactus out in the Sonora Desert.

 This a Barrel Cactus budding

 These are the buds for the Barrel Cactus, close up.  Don't have a fragrance and not sure I want to get close enought to try and smell.

 These are the Organ Pipe Cactus.  Grow in bunches and this is the one that the National Park is named after.

This is a giant Saguaro Cactus, stands about 50 feet tall and probably as many years old.  (50 years)It is about 2.5 feet in diameter. It is starting to bud, the flowers come out in late May and apparently the fruit which is red is extremely tasty and is sought after by birds, animals and human alike.  Might have to stay longer!!!