Cactus from the botanical gardens. These kind get a white hairy aspect to them.
Wandered through the Phoenix Botanical Gardens today. The display is mainly of succulents, desert gardens and desert ecosystems.

One of the surprising displays had an area with a light mesh metal cover. It seems the Phoenix sun is so strong that it can kill many of the cactii that are non-native to the Sonoran Plains. (more)
Cam Riley: South Sea Republic. Freedom, liberty, equity and an Australian Republic.